Md. Code Ann., Tax-Prop. § 2-108 — § 2-108

(a) Before taking office, each assessor shall take the oath required by Article I, § 9 of the Maryland Constitution.
(b) The assessor shall take the oath before the clerk or a deputy clerk of the circuit court for the county:
(1) in which the assessor resides; or
(2) that is designated by the Director.