To use Billing in a project:
from awsapilib import Billing
billing = Billing('arn:aws:iam::ACCOUNTID:role/ValidAdministrativeRole')
# Set tax inheritance on
billing.tax.inheritance = True
# Set tax information
billing.tax.set_information('some address', 'some city', 'some postal code', 'legal name', 'VAT', 'country code')
# Enable pdf invoice
billing.preferences.pdf_invoice_by_mail = True
# Enable credit sharing
billing.preferences.credit_sharing = True
# Set currency to EUR
billing.currency = 'EUR'
# Disable IAM access to billing (needs to be enabled by root and cannot be enabled by this after disabled!)
billing.iam_access = False