Md. Code Ann., Tax-Prop. § 8-222 — § 8-222

(a) To be assessed as planned development land under this section, the owner must apply to the supervisor.
(b) (1) Subject to paragraph (2) of this subsection, if the supervisor finds that the land meets the criteria of § 8–221 of this subtitle, the land shall be assessed at the rate equal to farm or agricultural land under § 8–209 of this subtitle.
(2) In Howard County, for Howard County property tax purposes, a planned development land assessment is available for qualified land for no more than 20 consecutive years beginning with the taxable year following the calendar year in which the land initially qualifies under paragraph (1) of this subsection.
(c) Except as provided by § 8–224 of this subtitle, property tax due on planned development land shall be based on the assessment of the land under this section and not on a greater assessment determined under § 8–223 of this subtitle.