diff --git a/README.md b/README.md
index d59b7ff..6d18219 100644
--- a/README.md
+++ b/README.md
@@ -19,11 +19,20 @@ Acquia Coding Standards for PHP includes a selection of sniffs from the followin
 
 ## Rulesets
 
-Rules are split into rulesets according to the project language and framework:
+Rules are split into rulesets according to the project *framework* and *visibility*:
+
+* Projects (e.g., Drupal modules) targeting the Drupal community should adopt a *Drupal* ruleset. All others should adopt a general *PHP* ruleset.
+* Public projects (e.g., open-source Drupal modules) should adopt a *non-strict* ruleset to facilitate external collaboration. All others should adopt a more opinionated *internal* ruleset.
+
+There are four permutations of these guidelines, leading to four rulesets to choose from:
+
+* [AcquiaPHP](src/Standards/AcquiaPHP/ruleset.xml) is based on PSR-12 and is intended for use on all public non-Drupal projects.
+* [AcquiaPHPStrict](src/Standards/AcquiaPHPStrict/ruleset.xml) is based on AcquiaPHP and adds additional more opinionated standards. It is intended for use on all internal non-Drupal projects.
+* [AcquiaDrupal](src/Standards/AcquiaDrupal/ruleset.xml) is based on the Drupal coding standard and is intended for use on all public Drupal projects.
+* [AcquiaDrupalStrict](src/Standards/AcquiaDrupalStrict/ruleset.xml) is based on AcquiaDrupal and adds the more opinionated DrupalPractice standard. It is intended for use on all internal Drupal projects.
+
+There is one additional ruleset intended to maintain backwards compatibility between major releases:
 
-* [AcquiaPHP](src/Standards/AcquiaPHP/ruleset.xml) contains sniffs applicable to all PHP projects.
-* [AcquiaDrupalStrict](src/Standards/AcquiaDrupalStrict/ruleset.xml) incorporates AcquiaPHP and adds all Drupal coding standards and best practices sniffs. Recommended for new Drupal projects and teams familiar with Drupal coding standards.
-* [AcquiaDrupalTransitional](src/Standards/AcquiaDrupalTransitional/ruleset.xml) incorporates AcquiaPHP and adds Drupal core's own phpcs configuration, which is less strict than the official standards. Recommended for legacy Drupal codebases or teams new to Drupal coding standards.
 * [AcquiaEdge](src/Standards/AcquiaEdge/ruleset.xml) incorporates AcquiaPHP and adds backwards-incompatible sniffs that will be included in AcquiaPHP with the next major release of this package.
 
 ## Installation & usage
diff --git a/example/phpcs.xml.dist b/example/phpcs.xml.dist
index 216045c..91fcea8 100644
--- a/example/phpcs.xml.dist
+++ b/example/phpcs.xml.dist
@@ -8,7 +8,8 @@
   <!-- Uncomment your chosen standard and the filename extensions corresponding to it. -->
   <!-- @see https://github.com/acquia/coding-standards-php/issues/18 for background on filename extensions. -->
   <rule ref="AcquiaDrupalStrict"/><arg name="extensions" value="php,module,inc,install,test,profile,theme,css,info,txt,md,yml"/>
-  <!-- <rule ref="AcquiaDrupalTransitional"/><arg name="extensions" value="php,module,inc,install,test,profile,theme,css,info,txt,md,yml"/> -->
+  <!-- <rule ref="AcquiaDrupal"/><arg name="extensions" value="php,module,inc,install,test,profile,theme,css,info,txt,md,yml"/> -->
+  <!-- <rule ref="AcquiaPHPStrict"/><arg name="extensions" value="php,inc,test,css,txt,md,yml"/> -->
   <!-- <rule ref="AcquiaPHP"/><arg name="extensions" value="php,inc,test,css,txt,md,yml"/> -->
   <!-- <rule ref="AcquiaEdge"/><arg name="extensions" value="php,inc,test,css,txt,md,yml"/> -->
 
diff --git a/src/Standards/AcquiaDrupalTransitional/ruleset.xml b/src/Standards/AcquiaDrupal/ruleset.xml
similarity index 52%
rename from src/Standards/AcquiaDrupalTransitional/ruleset.xml
rename to src/Standards/AcquiaDrupal/ruleset.xml
index 0159dc0..47c2d0e 100644
--- a/src/Standards/AcquiaDrupalTransitional/ruleset.xml
+++ b/src/Standards/AcquiaDrupal/ruleset.xml
@@ -3,10 +3,10 @@
 <!-- https://github.com/squizlabs/PHP_CodeSniffer/wiki/Annotated-Ruleset -->
 <ruleset xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:noNamespaceSchemaLocation="../../../vendor/squizlabs/php_codesniffer/phpcs.xsd"
-         name="AcquiaDrupalTransitional"
+         name="AcquiaDrupal"
 >
 
-  <description>Acquia's transitional Drupal coding standards.</description>
+  <description>Acquia's Drupal coding standards.</description>
 
   <!-- Drupal sniffs -->
   <rule ref="Drupal">
@@ -32,22 +32,4 @@
   <!-- Drupal Practice sniffs -->
   <rule ref="DrupalPractice.Commenting.ExpectedException"/>
 
-  <!-- Acquia PHP sniffs -->
-  <rule ref="AcquiaPHP"/>
-
-  <!-- Drupal should type hint hooks -->
-  <!-- @see https://www.drupal.org/project/drupal/issues/3229216 -->
-  <rule ref="SlevomatCodingStandard.TypeHints.ReturnTypeHint.MissingTraversableTypeHintSpecification">
-    <exclude-pattern>*/modules/custom/*/*\.(module|install)$</exclude-pattern>
-  </rule>
-  <rule ref="SlevomatCodingStandard.TypeHints.ReturnTypeHint.MissingAnyTypeHint">
-    <exclude-pattern>*/modules/custom/*/*\.(module|install)$</exclude-pattern>
-  </rule>
-  <rule ref="SlevomatCodingStandard.TypeHints.ParameterTypeHint.MissingAnyTypeHint">
-    <exclude-pattern>*/modules/custom/*/*\.(module|install)$</exclude-pattern>
-  </rule>
-  <rule ref="SlevomatCodingStandard.TypeHints.ParameterTypeHint.MissingTraversableTypeHintSpecification">
-    <exclude-pattern>*/modules/custom/*/*\.(module|install)$</exclude-pattern>
-  </rule>
-
 </ruleset>
diff --git a/src/Standards/AcquiaDrupalStrict/ruleset.xml b/src/Standards/AcquiaDrupalStrict/ruleset.xml
index 4fac5fe..3679d6e 100644
--- a/src/Standards/AcquiaDrupalStrict/ruleset.xml
+++ b/src/Standards/AcquiaDrupalStrict/ruleset.xml
@@ -9,45 +9,9 @@
   <description>Acquia's strict Drupal coding standards.</description>
 
   <!-- Drupal sniffs -->
-  <rule ref="Drupal">
-    <exclude name="Drupal.Files.TxtFileLineLength.TooLong"/>
-  </rule>
-  <!-- Relax rules for automated tests -->
-  <rule ref="Drupal.Arrays.Array.LongLineDeclaration">
-    <exclude-pattern>tests/*</exclude-pattern>
-  </rule>
-  <rule ref="Drupal.Commenting.ClassComment.Missing">
-    <exclude-pattern>tests/*</exclude-pattern>
-  </rule>
-  <rule ref="Drupal.Commenting.DocComment.MissingShort">
-    <exclude-pattern>tests/*</exclude-pattern>
-  </rule>
-  <rule ref="Drupal.Commenting.FunctionComment.Missing">
-    <exclude-pattern>tests/*</exclude-pattern>
-  </rule>
-  <rule ref="Drupal.Commenting.VariableComment.Missing">
-    <exclude-pattern>tests/*</exclude-pattern>
-  </rule>
+  <rule ref="AcquiaDrupal"/>
 
   <!-- Drupal Practice sniffs -->
   <rule ref="DrupalPractice"/>
 
-  <!-- Acquia PHP sniffs -->
-  <rule ref="AcquiaPHP"/>
-
-  <!-- Drupal should type hint hooks -->
-  <!-- @see https://www.drupal.org/project/drupal/issues/3229216 -->
-  <rule ref="SlevomatCodingStandard.TypeHints.ReturnTypeHint.MissingTraversableTypeHintSpecification">
-    <exclude-pattern>*/modules/custom/*/*\.(module|install)$</exclude-pattern>
-  </rule>
-  <rule ref="SlevomatCodingStandard.TypeHints.ReturnTypeHint.MissingAnyTypeHint">
-    <exclude-pattern>*/modules/custom/*/*\.(module|install)$</exclude-pattern>
-  </rule>
-  <rule ref="SlevomatCodingStandard.TypeHints.ParameterTypeHint.MissingAnyTypeHint">
-    <exclude-pattern>*/modules/custom/*/*\.(module|install)$</exclude-pattern>
-  </rule>
-  <rule ref="SlevomatCodingStandard.TypeHints.ParameterTypeHint.MissingTraversableTypeHintSpecification">
-    <exclude-pattern>*/modules/custom/*/*\.(module|install)$</exclude-pattern>
-  </rule>
-
 </ruleset>
diff --git a/src/Standards/AcquiaPHP/ruleset.xml b/src/Standards/AcquiaPHP/ruleset.xml
index 3041e70..8e8e878 100644
--- a/src/Standards/AcquiaPHP/ruleset.xml
+++ b/src/Standards/AcquiaPHP/ruleset.xml
@@ -8,35 +8,7 @@
 
   <description>Acquia's PHP coding standards.</description>
 
-  <!-- Drupal sniffs -->
-  <!-- These provide PHPCBF integration, unlike their Squiz equivalents -->
-  <rule ref="Drupal.Classes.ClassDeclaration" />
-  <rule ref="Drupal.Classes.UnusedUseStatement"/>
-  <!-- https://www.php-fig.org/psr/psr-12/#5-control-structures -->
-  <rule ref="Drupal.ControlStructures.ControlSignature" />
-  <rule ref="Drupal.Functions.FunctionDeclaration" />
-  <rule ref="Drupal.Scope.MethodScope"/>
-  <rule ref="Drupal.WhiteSpace.ScopeIndent"/>
-
-  <!-- Generic sniffs -->
-  <rule ref="Generic.Arrays.DisallowLongArraySyntax"/>
-  <rule ref="Generic.Files.ByteOrderMark"/>
-  <rule ref="Generic.Files.EndFileNewline" />
-  <rule ref="Generic.Files.LineEndings"/>
-  <rule ref="Generic.Formatting.SpaceAfterCast"/>
-  <rule ref="Generic.Functions.FunctionCallArgumentSpacing"/>
-  <rule ref="Generic.Functions.OpeningFunctionBraceKernighanRitchie">
-    <properties>
-      <property name="checkClosures" value="true"/>
-    </properties>
-  </rule>
-  <rule ref="Generic.NamingConventions.ConstructorName"/>
-  <rule ref="Generic.NamingConventions.UpperCaseConstantName"/>
-  <rule ref="Generic.PHP.DeprecatedFunctions"/>
-  <rule ref="Generic.PHP.DisallowShortOpenTag"/>
-  <rule ref="Generic.PHP.LowerCaseKeyword"/>
-  <rule ref="Generic.PHP.UpperCaseConstant"/>
-  <rule ref="Generic.WhiteSpace.DisallowTabIndent"/>
+  <rule ref="PSR12" />
 
   <!-- Internal sniffs -->
   <rule ref="Internal.NoCodeFound">
@@ -44,53 +16,6 @@
     <exclude-pattern>*.(md|txt|yml)</exclude-pattern>
   </rule>
 
-  <!-- MySource sniffs -->
-  <rule ref="MySource.Debug.DebugCode"/>
-
-  <!-- PEAR sniffs -->
-  <rule ref="PEAR.Files.IncludingFile"/>
-  <!-- Disable some error messages that we do not want. -->
-  <rule ref="PEAR.Files.IncludingFile.UseIncludeOnce">
-    <severity>0</severity>
-  </rule>
-  <rule ref="PEAR.Files.IncludingFile.UseInclude">
-    <severity>0</severity>
-  </rule>
-  <rule ref="PEAR.Files.IncludingFile.UseRequireOnce">
-    <severity>0</severity>
-  </rule>
-  <rule ref="PEAR.Files.IncludingFile.UseRequire">
-    <severity>0</severity>
-  </rule>
-  <rule ref="PEAR.Functions.FunctionCallSignature.OpeningIndent">
-    <severity>0</severity>
-  </rule>
-  <rule ref="PEAR.Functions.ValidDefaultValue"/>
-  <rule ref="PEAR.Functions.FunctionCallSignature"/>
-  <!-- The sniffs inside PEAR.Functions.FunctionCallSignature silenced below are
-    also silenced in Drupal CS' ruleset.xml. The code below is a 1-to-1 copy
-    from that file. -->
-  <!-- Disable some error messages that we already cover. -->
-  <rule ref="PEAR.Functions.FunctionCallSignature.SpaceAfterOpenBracket">
-    <severity>0</severity>
-  </rule>
-  <rule ref="PEAR.Functions.FunctionCallSignature.SpaceBeforeCloseBracket">
-    <severity>0</severity>
-  </rule>
-  <!-- Disable some error messages that we do not want. -->
-  <rule ref="PEAR.Functions.FunctionCallSignature.Indent">
-    <severity>0</severity>
-  </rule>
-  <rule ref="PEAR.Functions.FunctionCallSignature.ContentAfterOpenBracket">
-    <severity>0</severity>
-  </rule>
-  <rule ref="PEAR.Functions.FunctionCallSignature.CloseBracketLine">
-    <severity>0</severity>
-  </rule>
-  <rule ref="PEAR.Functions.FunctionCallSignature.EmptyLine">
-    <severity>0</severity>
-  </rule>
-
   <!-- PHP Compatibility sniffs -->
   <!-- The lowest version of PHP supported by both Drupal and Acquia Cloud.
     @see https://www.drupal.org/docs/8/system-requirements/php-requirements
@@ -102,131 +27,4 @@
     <exclude name="PHPCompatibility.Extensions.RemovedExtensions.famRemoved"/>
   </rule>
 
-  <!-- PSR-2 sniffs -->
-  <rule ref="PSR2.Classes.PropertyDeclaration">
-    <exclude name="PSR2.Classes.PropertyDeclaration.Underscore"/>
-  </rule>
-  <rule ref="PSR2.Namespaces.NamespaceDeclaration"/>
-  <rule ref="PSR2.Namespaces.UseDeclaration">
-    <exclude name="PSR2.Namespaces.UseDeclaration.UseAfterNamespace"/>
-  </rule>
-
-  <!-- PSR-12 sniffs -->
-  <rule ref="PSR12.Functions.ReturnTypeDeclaration" />
-
-  <!-- SlevomatCodingStandard sniffs -->
-  <rule ref="SlevomatCodingStandard.Namespaces.AlphabeticallySortedUses" />
-  <rule ref="SlevomatCodingStandard.TypeHints.ParameterTypeHint" />
-  <rule ref="SlevomatCodingStandard.TypeHints.PropertyTypeHint" />
-  <rule ref="SlevomatCodingStandard.TypeHints.ReturnTypeHint" />
-  <!-- Superglobals are superbad. See linked issue for discussion.
-  @see https://github.com/acquia/coding-standards-php/issues/49 -->
-  <rule ref="SlevomatCodingStandard.Variables.DisallowSuperGlobalVariable" />
-
-  <!-- Squiz sniffs -->
-  <rule ref="Squiz.Arrays.ArrayBracketSpacing"/>
-  <rule ref="Squiz.Arrays.ArrayDeclaration">
-    <exclude name="Squiz.Arrays.ArrayDeclaration.NoKeySpecified"/>
-    <exclude name="Squiz.Arrays.ArrayDeclaration.KeySpecified"/>
-  </rule>
-  <!-- Disable some error messages that we do not want. -->
-  <rule ref="Squiz.Arrays.ArrayDeclaration.CloseBraceNotAligned">
-    <severity>0</severity>
-  </rule>
-  <rule ref="Squiz.Arrays.ArrayDeclaration.DoubleArrowNotAligned">
-    <severity>0</severity>
-  </rule>
-  <rule ref="Squiz.Arrays.ArrayDeclaration.FirstValueNoNewline">
-    <severity>0</severity>
-  </rule>
-  <rule ref="Squiz.Arrays.ArrayDeclaration.KeyNotAligned">
-    <severity>0</severity>
-  </rule>
-  <rule ref="Squiz.Arrays.ArrayDeclaration.MultiLineNotAllowed">
-    <severity>0</severity>
-  </rule>
-  <rule ref="Squiz.Arrays.ArrayDeclaration.NoComma">
-    <severity>0</severity>
-  </rule>
-  <rule ref="Squiz.Arrays.ArrayDeclaration.NoCommaAfterLast">
-    <severity>0</severity>
-  </rule>
-  <rule ref="Squiz.Arrays.ArrayDeclaration.NotLowerCase">
-    <severity>0</severity>
-  </rule>
-  <rule ref="Squiz.Arrays.ArrayDeclaration.SingleLineNotAllowed">
-    <severity>0</severity>
-  </rule>
-  <rule ref="Squiz.Arrays.ArrayDeclaration.ValueNotAligned">
-    <severity>0</severity>
-  </rule>
-  <rule ref="Squiz.Arrays.ArrayDeclaration.ValueNoNewline">
-    <severity>0</severity>
-  </rule>
-  <rule ref="Squiz.ControlStructures.ForEachLoopDeclaration"/>
-  <!-- Disable some error messages that we already cover. -->
-  <rule ref="Squiz.ControlStructures.ForEachLoopDeclaration.AsNotLower">
-    <severity>0</severity>
-  </rule>
-  <rule ref="Squiz.ControlStructures.ForEachLoopDeclaration.SpaceAfterOpen">
-    <severity>0</severity>
-  </rule>
-  <rule ref="Squiz.ControlStructures.ForEachLoopDeclaration.SpaceBeforeClose">
-    <severity>0</severity>
-  </rule>
-  <rule ref="Squiz.ControlStructures.ForLoopDeclaration"/>
-  <!-- Disable some error messages that we already cover. -->
-  <rule ref="Squiz.ControlStructures.ForLoopDeclaration.SpacingAfterOpen">
-    <severity>0</severity>
-  </rule>
-  <rule ref="Squiz.ControlStructures.ForLoopDeclaration.SpacingBeforeClose">
-    <severity>0</severity>
-  </rule>
-  <rule ref="Squiz.Functions.MultiLineFunctionDeclaration"/>
-  <rule ref="Squiz.Functions.MultiLineFunctionDeclaration.BraceOnSameLine">
-    <severity>0</severity>
-  </rule>
-  <rule ref="Squiz.Functions.MultiLineFunctionDeclaration.ContentAfterBrace">
-    <severity>0</severity>
-  </rule>
-  <!-- Standard yet to be finalized on this
-    (https://www.drupal.org/node/1539712). -->
-  <rule ref="Squiz.Functions.MultiLineFunctionDeclaration.FirstParamSpacing">
-    <severity>0</severity>
-  </rule>
-  <rule ref="Squiz.Functions.MultiLineFunctionDeclaration.Indent">
-    <severity>0</severity>
-  </rule>
-  <rule ref="Squiz.Functions.MultiLineFunctionDeclaration.CloseBracketLine">
-    <severity>0</severity>
-  </rule>
-  <rule ref="Squiz.Functions.FunctionDeclarationArgumentSpacing">
-    <properties>
-      <property name="equalsSpacing" value="1"/>
-    </properties>
-  </rule>
-  <rule
-    ref="Squiz.Functions.FunctionDeclarationArgumentSpacing.NoSpaceBeforeArg">
-    <severity>0</severity>
-  </rule>
-  <rule ref="Squiz.PHP.LowercasePHPFunctions"/>
-  <rule ref="Squiz.Strings.ConcatenationSpacing">
-    <properties>
-      <property name="spacing" value="1"/>
-      <property name="ignoreNewlines" value="true"/>
-    </properties>
-  </rule>
-  <rule ref="Squiz.WhiteSpace.FunctionSpacing">
-    <properties>
-      <property name="spacing" value="1"/>
-    </properties>
-  </rule>
-  <rule ref="Squiz.WhiteSpace.LanguageConstructSpacing"/>
-  <rule ref="Squiz.WhiteSpace.OperatorSpacing" />
-  <rule ref="Squiz.WhiteSpace.SemicolonSpacing"/>
-  <rule ref="Squiz.WhiteSpace.SuperfluousWhitespace"/>
-
-  <!-- Zend sniffs -->
-  <rule ref="Zend.Files.ClosingTag"/>
-
 </ruleset>
diff --git a/src/Standards/AcquiaPHPStrict/ruleset.xml b/src/Standards/AcquiaPHPStrict/ruleset.xml
new file mode 100644
index 0000000..1c7f7ad
--- /dev/null
+++ b/src/Standards/AcquiaPHPStrict/ruleset.xml
@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<!-- https://github.com/squizlabs/PHP_CodeSniffer/wiki/Annotated-Ruleset -->
+<ruleset xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:noNamespaceSchemaLocation="../../../vendor/squizlabs/php_codesniffer/phpcs.xsd"
+         name="AcquiaPHPStrict"
+>
+
+  <description>Acquia's strict PHP coding standards.</description>
+
+  <rule ref="AcquiaPHP"/>
+
+  <!-- SlevomatCodingStandard sniffs -->
+  <rule ref="SlevomatCodingStandard.Namespaces.AlphabeticallySortedUses" />
+  <rule ref="SlevomatCodingStandard.TypeHints.ParameterTypeHint" />
+  <rule ref="SlevomatCodingStandard.TypeHints.PropertyTypeHint" />
+  <rule ref="SlevomatCodingStandard.TypeHints.ReturnTypeHint" />
+  <!-- Superglobals are superbad. See linked issue for discussion.
+  @see https://github.com/acquia/coding-standards-php/issues/49 -->
+  <rule ref="SlevomatCodingStandard.Variables.DisallowSuperGlobalVariable" />
+
+</ruleset>