Omnibus Election Code
Section 187. Committee on printing, storage, and distribution of official ballots and election returns. - The Commission shall appoint a committee of five members, two of whom shall be from among its personnel, the third to be designated by the Commission on Audit, and the last two to be designated by the ruling party and the dominant opposition party to act as its representatives in supervising the printing, storage and distribution of official ballots and election returns.
Upon the request of any candidate, political party or of civic, religious, professional, business, service, youth or any similar organizations collectively designated by the Commission, the latter shall allow any person designated by any of the former as watcher to observe the proceedings of the committee on the printing of official ballots and election returns, file objections, if any, witness the printing and distribution of the ballots and the returns and guard the premises of the printer.