Maryland Code, Election Law § 12-202

(1) is inconsistent with this article or other law applicable to the elections process; and

(2) may change or has changed the outcome of the election.

(1) 10 days after the act or omission or the date the act or omission became known to the petitioner; or

(2) 7 days after the election results are certified, unless the election was a gubernatorial primary or special primary election, in which case 3 days after the election results are certified.