Last year notifications seem to have been completed by early March. Here is a link that supports that statement:
My daughter has Ivy League level stats, but isn’t interested in an Ivy League school, she wants to attend TAMU. She already has safety admits at Alabama and others, but TAMU is her #1 choice. The only way she’ll be able to attend as an OOS student is to win a scholarship large enough to qualify for an OOS tuition waiver. She just missed the NMSF cut off on the PSAT, so National Merit Scholarship isn’t an option for her.