Congresswoman Regina Ongsiako Reyes was proclaimed by the Marinduque COMELEC Provincial board of Canvassers and subsequently took her oath of office before no less than President Benigno S. Aquino in Malacanang and House Speaker Feliciano Belmonte. The constitution provides that after a winning candidate has been proclaimed and have taken the oath of office, all election related-cases should be filed at the House of Representatives Electoral Tribunal which has the sole jurisdiction and right to try and decide post-proclamation election related cases of the members of congress. Lord Allan Jay Velasco, recognized the authority and jurisdiction of the HRET when he filed the same disqualification before the HRET. Congresswoman Regina Ongsiako Reyes is the duly elected and recognized Representattive for the Lone Congressional District of Marinduque. She is on the official roll of the 16th Congress. She also took another oath of office during President Benigno S. Aquino's State of the Nation Address in open Congress session.
The HRET historically, has full jurisdiction over the case but inspite of this, the Supreme Court has issued repeated rulings and decisions recently which purportedly has no clear bearing on the case but is just deemed to influence the HRET to follow it's pronouncements that would ultimately benefit the son of Supreme Court Justice Presbitero Velasco. Justice Velasco is the father of losing candidate Lord Allan Velasco.
Incumbent governor Carmencita Reyes is running for a second term, having assumed the governorship after defeating then-incumbent Jose Antonio Carrion in the 2010 election, alongside her running mate, vice governor Antonio Uy, Jr. Although she was a guest candidate of the Liberal Party the previous election, having run as a member of the party-list group Bigkis Pinoy, for this election she is running as the Liberal Party candidate. Reyes' running mate is doctor Romulo Bacorro.
Uy has since left the Liberal Party and has decided to run for governor under the NUP, the party of Congressman Velasco. However, he does not have a running mate; instead, the NUP is endorsing Melecio Go of the Nacionalista Party for the position of vice governor. Go is currently a member of the Sangguniang Panlalawigan for the province's first district, and was elected in 2010 as an independent.
Carrion is seeking to retake his seat after losing the previous election to Reyes. Though he ran under the Lakas–CMD ticket in 2010, for this election he is running under the banner of the Nationalist People's Coalition. His running mate is Jose Alvarez, who previously sat as a member of the Sangguniang Panlalawigan for the province's first district.
Despite being disqualified by the COMELEC en banc, Regina Ongsiako Reyes was proclaimed anyway by the Provincial Board of Canvassers on May 15, 2013, although the camp of Lord Allan Jay Velasco attempted to stop the proclamation. Edwin Villa, the provincial election supervisor and head of Marinduque's Provincial Board of Canvassers, has since been replaced by Val Mendoza, the provincial election supervisor of Romblon, although it is unclear whether Mendoza assumed the position. Villa has since gone into hiding.