Relating to corporate apportionment; prescribing an effective date.

For purposes of corporate tax apportionment calculations, replaces sales factor with receipts factor. Defines "receipts" to mean gross receipts received from transactions and activity occurring in taxpayer's regular course of business, with certain exclusions. In determination of receipts factor, provides that sales other than sales of tangible personal property are in state if taxpayer's market for sales is in state. Enumerates conditions in which market for sales is deemed to be in state. Applies to tax years beginning on or after January 1, 2018. Takes effect on 91st day following adjournment sine die.