Social Democrats receive 14 per cent of first preferences in poll, with social issues being big motivating factor.
The proposal, if passed, will create three zones around the Health Centre, Sports Centre, and Arts Block, where smoking will not be permitted.
More than 900 signatures were collected by group proposing referendum to rejoin national union.
As of March 1st this year, the wage paid to fourth-year nursing and midwifery student interns will be €9.48 an hour.
The event, which raises funds for Amnesty International and St Vincent de Paul, is still accepting donations.
McNulty, who ran on a platform of empowerment, equality, college efficiency and accommodation, won on the second count with 49.8 per cent of the vote.
Ó Faoilleacháin won with 59.4 per cent of the vote on the first count, beating competitor Patrick Higgins.
Ní Lochlainn stormed ahead of her competition, winning on the first count with 60.3 per cent of votes.
Rowley won on the fourth count with 50.6 per cent, with Caolán Maher coming in second place.
The TCDSU elections have seen an 18 per cent decrease in voter turnout compared to last year, with only 3,894 votes cast.