REVENUE MEMORANDUM ORDER NO. 9-2005 issued on April 13, 2005 amends RMO No. 18-98 relative to the process ownership of the different systems/modules under the Integrated Tax System (ITS) in its shift into “enhanced” ITS. All functions and activities preformed by these systems/modules shall be transferred permanently to the designated Services of the Bureau which shall include these activities in their Statement of Functions.