31 or earlier. During the period, Rosselló filed a civil lawsuit against Acevedo Vilá himself over a dispute of certain ballots that were cast during the elections. This led to a protracted controversy involving appeals to the United States federal courts and the Supreme Court of Puerto Rico. The ballots in question were cast by marking the Puerto Rican Independence Party or New Progressive Party (i.e. marking a cross under the emblem of one of these parties) in addition to placing individual candidate marks (crosses) in favor of Acevedo Vilá as the candidate for governor of the Popular Democratic Party and Roberto Prats, the Popular Democratic Party's candidate for Resident Commissioner. The mark indicating the selection of a political party selects that party's slate of candidates by default, but the voter can also select individual candidates from other parties to replace candidates from the default slate. The controversy reached the Supreme Court of Puerto Rico, which ruled 4–3 that the ballots in question were valid. In its initial opinion, the Supreme Court majority interpreted the challenged ballots as indicating that voters were voting for the PIP as a party for the purposes of stating party affiliation (and for the PIP's default slate) but had decided to move their votes to individual candidates from other party's slates. This type of vote, described as a "mixed vote", is permitted in Rule 50 of the State Election Commission's rules, based on the Commonwealth's Electoral Law as amended in 2004, Title 2, Section 2.001, Subsection 3. The practice is therefore considered legal and has been published in the official voter's instructions by the State Election Commission for quite some time. This voting option was also allowed and seen in the 1996 and 2000 elections, and had never been contested before, either at the Legislature or by the NPP's Electoral Commissioner. The individual votes for candidates not from the voter's selected party are then deducted from the votes given to the default candidates of the voter's party. The end result is a single vote per candidate. At the same time, Rosselló challenged the ballots on the United States District Court for the District of Puerto Rico where District Judge Daniel Domínguez ordered the Puerto Rico Election Commission to count the disputed votes but to not adjudicate them to any candidate until he reached a decision on the merits of the case. Acevedo Vilá and his