If someone got a possession in school zone. Can the school zone be waived or dropped?

Yes, absolutely.  But first-off, don't assume that just because the person was in possession of the contraband in the school zone means he is legally guilty.  A competent criminal defense lawyer would be able to sort out the issues and determine if the drugs can be "linked" to this person, or if the officer conducted an illegal search.  Many lawyers will offer free consultations on narcotics cases.  Call a criminal defense lawyer and get them working on the case.  Hope i helped.