Except for the City of Baltimore, the provisions of this section do not apply to a municipal corporation in the State in which the municipal or charter elections are regulated by the public local laws of the State or the charter of the municipal corporation. Each local board, in accordance with the provisions of this article and regulations adopted by the State Board, shall: oversee the conduct of all elections held in its county and ensure that the elections process is conducted in an open, convenient, and impartial manner; in accordance with the State Personnel and Pensions Article, or its county merit system, whichever is applicable, appoint an election director to manage the operations and supervise the staff of the local board; confer with the State Administrator in appointing an election director under item (2) of this subsection; maintain an office and warehouse and be open for business as provided in this article, and, subject to § 9–106 of this article, provide the supplies and equipment necessary for the proper and efficient conduct of voter registration and election, including: supplies and equipment required by the State Board; and office, early voting center, and polling place equipment expenses; adopt any regulation it considers necessary to perform its duties under this article, which regulation shall become effective when it is filed with and approved by the State Board; serve as the local board of canvassers and certify the results of each election conducted by the local board; establish and alter the boundaries and number of precincts in accordance with § 2–303 of this title, and provide a suitable polling place for each precinct, and assign voters to precincts; provide to the general public timely information and notice, by publication or mail, concerning voter registration and elections; make determinations and hear and decide challenges and appeals as provided by law; aid in the prosecution of an offense under this article; and when the board finds there is probable cause to believe an offense has been committed, refer the matter to the appropriate prosecutorial authority; maintain and dispose of its records in accordance with the plan adopted by the State Board under § 2–106 of this title; and administer voter registration and absentee voting for nursing homes and assisted living facilities in accordance with procedures established by the State Administrator, subject to the approval of the State Board. Subsection (b)(3) of this section may not be construed to affect the exclusive authority of a local board to appoint an election director under subsection (b)(2) of this section. In Garrett County, following each decennial census of the United States, the local board shall: evaluate the population of the county commissioner districts to determine whether the districts are of substantially equal population; and recommend to the Garrett County Delegation to the General Assembly any adjustments of the boundaries of those districts that are necessary to maintain districts of substantially equal population. In Montgomery County, the local board shall require an affirmative vote of not fewer than three duly confirmed regular members of the local board, at least one of whom shall be a member of the principal minority party, to appoint an election director.