And now the final bit from the policies & procedures of the Printz Award, all wording taken verbatim from the YALSA site.
Relationship with Publishers
Committee members should not solicit publishers for free personal copies of books. If members are offered or receive unsolicited copies of books from publisher(s), they may be accepted.
Committee members should not solicit publishers for favors, invitations, etc. If members receive these, however, they will use their own judgment in accepting. Publishers understand that such acceptance in no way influences members' actions or selections.