Section 35. Section 237 of the National Internal Revenue Code of 1997, as amended, is hereby further amended to read as follows:

"SEC. 237. Issuance of Sales or Commercial Invoices. -

1. issuance. - All persons subject to an internal revenue tax shall, at the point of each sale and transfer of merchandise or for services rendered valued at Five hundred pesos (P500) or more, issue duly registered sale or commercial invoices, showing the name, Taxpayer Identification Number, date of transaction, quantity, unit cost and description of merchandise or nature of service: Provided, That the amount herein stated shall be adjusted to its present values every three (3) years using the consumer price index, as published by the Philippine Statistics Authority: Provided, further, That the seller shall issue sale or commercial invoices when the buyer so requires regardless of the amount of transaction: Provided, however, That if the sales amount per transaction is below the threshold, the seller will issue one (1) invoice for the aggregate sales amount for such sales at the end of the day: Provided, further, That the aggregate sales amount at the end of the day is at least Five hundred pesos (P500): Provided, finally, That VAT-registered persons shall issue duly registered sale or commercial invoices regardless of the amount of the sale and transfer of merchandise or for services rendered.

x x x."