1)
What are the connotations of "asher Yikrav"?
1.
Eevachim, 45b: It means that one is only Chayav if one eats Kodshim that are ready to be sacrificed, but not before. 1
1
See Torah Temimah, note 8.
2)
Seeing as the prohibition of Ba'alei-Mumin is confined to the Kohanim, why does the Pasuk insert "Kol B'nei Yisrael"?
1.
Rashi: It is a warning to Beis-Din to make sure that the Kohanim observe the Dinim that pertain to them.
2.
Oznayim la'Torah: Refer to 21:18:2.3:1. 1
1
See Oznayim la'Torah here, who reconciles this Pasuk with the beginning of this Parshah, where Hashem commanded Moshe to speak to Aharon exclusively.