Michael Lohan to Dina: You've Got Two Weeks!

Michael Lohan swears he'll pipe down for the next two weeks ... provided his dysfunctional ex-wife gets her act in that time, otherwise it is SO on again.

Issuing a deadline to Dina Lohan - giving her over two weeks to sit down and talk about Lindsay and Ali Lohan - Mike promises to STFU for the moment.

After that, though, he will drag N.Y. State into the War of the Lohans.

He and Dina will meet face-to-face on May 13 for a deposition in their child support battle, and that's when he wants to talk about 16-year-old Ali Lohan.

Specifically, Michael has issues with the fact that she's living in L.A. with Lindsay ... who's appeared less than stable lately. That's putting it kindly, too.

Michael Lohan is doing all living things a favor and offering to shut up until May 13. That's when he's threatening to bring the state into his escalating family drama.

Michael says if Dina Lohan dodges the conversation that day, he will quickly get Child Protective Services of New York State involved in the ugly situation.

Presumably the agency has jurisdiction since Ali's address is still in N.Y.? Michael struck out attempting to raid her house and free Ali in L.A. last week.

Michael claims he'll be quiet until the "deadline."

No word if his self-imposed gag order means only interviews or also includes a moratorium on Tweets about Lindsay being HIV positive. One can hope.