The relevant bit of the law (from
http://www.congress.gov.ph/download/ra_10/RA08293.pdf) reads:
SEC. 176. Works of the Government. – 176.1. No copyright
shall subsist in any work of the Government of the Philippines.
However, prior approval of the government agency or office wherein
the work is created shall be necessary for exploitation of such
work for profit. Such agency or office may, among other things,
impose as a condition the payment of royalties. No prior approval
or conditions shall be required for the use for any purpose of
statutes, rules and regulations, and speeches, lectures, sermons,
addresses, and dissertations, pronounced, read or rendered in
courts of justice, before administrative agencies, in deliberative
assemblies and in meetings of public character. (Sec. 9, first par.,
P.D. No. 49)
The second part sounds like actual public domain ("no prior approval or
conditions"), so I guess wikisource can freely use, for example, public
speeches made by the president. The list does not include pictures, sadly.
-Mark