Board members the University of Windsor’s biggest student group may not be supportive of a new Lancer student Recreation Complex.

Graduate students held a referendum two weeks ago and voted in favour of the $73 million recreation facility.

It overturns a previous referendum result for grad students, who opposed the project in 2015. In that same referendum, full-time and part-time undergrads voted in favour of the facility, which will be built by 2020 and add at least $125 to tuition for the next 30 years.

OPUS, which represents part-time students, indicated its 'yes' vote from a previous referendum last year on the same topic would stand.

The UWSA, which represents roughly 11,000 full-time undergraduate students, also agreed to uphold their previous referendum results.

But RJ D’Aguilar, a senate rep on the UWSA board chaired that meeting.

“During the meeting of Nov. 10, 2016, the USWA board voted to accept their legal advice from 3rd party council regarding the referendum question," D’Aguilar says.

Sources say the Graduate Students’ Society decided to move forward with the new referendum because they were told multiple times the other student groups’ previous results would stand.

But D’Aguilar says two weeks later at its next board meeting, the UWSA’s board of directors rescinded a motion to uphold the full-time students’ referendum results.

That was the same day GSS referendum polls closed, on Nov. 24.

UWSA president Moussa Hamadani confirmed to CTV News the board of directors will be looking into that position at its regularly scheduled meeting tomorrow.

According to Hamadani -- that could result in another referendum for undergrads in the new year.

OPUS reps say they also have a meeting scheduled for Wednesday night, where the referendum results from 2015 will be discussed.

The project requires board approval from all three student unions to move forward.

The LSRC committee declined to comment until the boards make a final decision.