Revenue Regulations No. 25-2018: Regulations Implementing Section 109 (AA) of the National Internal Revenue Code (NIRC) of 1997, as amended, Pursuant to Section 34 of the RA 10963 (TRAIN Law) Providing for Value-Added Tax (VAT) Exemption on the Sale of Drugs and Medicines Prescribed for Diabetes, High Cholesterol and Hypertension (Published in Manila Times on December 28, 2018)