Lori Loughlin and Mossimo Giannulli are gunning to head south of the border once more -- only this time, its for a wedding ... but first, they'll need to get the all clear from court.

The convicted couple just filed legal docs asking for permission to take a week-long trip down to San Jose del Cabo next month ... where they say they plan to be in attendance for someone's nuptials. Lori and Mossimo say they'd be gone from Nov. 5 to Nov. 12.

As for why they should be allowed to go, the pair note they've been compliant with the terms of their supervised release since getting out of prison. Lori cites the $150k fine she had to fork over as part of her sentence and says she's done with her community service.

Mossimo, for his part, says he's paid his $250k fine and says he's making progress on the community service. In other words ... we've paid for our college admission scandal sins.

Worth noting, this is is the exact same reasoning as last time -- remember, they went to Cabo back in June, and cited the same rationale, which a judge approved. So, ya gotta figure they'll be given the green light again.

Lori and Mossimo also claim their probation offices have their back in the ask -- which should help get it approved.

The judge has yet to rule.