A. To prevent evasion of the interstate telecommunications gross receipts tax and to aid in its administration, it is presumed that all receipts of a person engaging in interstate telecommunications business are subject to the interstate telecommunications gross receipts tax.
B. If receipts from nontaxable charges for mobile telecommunications services are aggregated with and not separately stated from taxable charges for mobile telecommunications services, then the charges for nontaxable mobile telecommunications services shall be subject to interstate telecommunications gross receipts tax unless the home service provider can reasonably identify nontaxable charges in its books and records that are kept in the regular course of business.