Legacy Question?

[Rosiegal]

Ok, so these are the organizations that people have confirmed that half-sisters count as legacies:

Alpha Delta Pi
Alpha Omicron Pi
Phi Mu
Sigma Kappa

I'm hesitant to contact the Greek Life office at my school, because in the past when my friends and I have relied on information from there, we are constantly getting conflicting information. Aren't these national policies, though? All my friend sorority members say they aren't sure.