SECTION 1. Section 11 of Republic Act No. 8339 is hereby amended to read as follows:
"SEC. 11. Tax Provisions. - The grantee, its successors or assigns, shall pay to the Philippine Government during the life of its franchise a franchise tax of five percent (5%) of the gross revenues derived by the grantee from its transport operations.
In the event that any competing individual, partnership or corporation receives or enjoys tax privileges and other favorable terms which tend to place the herein grantee at any disadvantage, then such provisions shall be deemed ipso facto part hereof and shall operate equally in favor of the grantee.
The grantee shall, however, be subject to income tax levied under Title II of the National Internal Revenue Code, as amended, and tax on its real property under existing laws on revenues earned from activities other than air transportation."