Issues excluded from being the subject of an initiative at the national level
Philippines
Republic Act No. 6735 'TheInitiative and Referendum Act'
http://www.chanrobles.com/republicactno6735.htm#.UMhZ8Gd32uI
Sec. 10. Prohibited Measures. — Thefollowing cannot be the subject of an initiative or referendum petition:
(a) No petition embracing more than one (1) subject shall besubmitted to the electorate; and
(b) Statutes involving emergency measures, theenactment of which are specifically vested in Congress by the Constitution,cannot be subject to referendum until ninety (90) days after its effectivity.