rcfile security checks

Are the usual security checks on the permissions of an rcfile and on the
directory where it resides performed when ....

1. ... an rcfile that passed the security checks has an INCLUDERC assignment
   naming another rcfile?

2. ... procmail was started suid root as the LDA and /etc/procmailrc sets
   DROPPRIVS = yes and then assigns INCLUDERC?

Thanks.