Deadline to fill vacancy due to death or disqualification of unopposed candidate. Within 4 days after death or disqualification becomes known to the local board.

EL § 5-901(e)(2)

Deadline to fill vacancy if:
(1) no candidate for a political party files a Certificate of Candidacy ; or
(2) an unopposed candidate withdraws. Within 4 days after deadline for withdrawal of candidacy.

EL § 5-901(e)(1)