Md. Code, Land Use § 20-522

(a) Except as provided in subsections (b) and (c) of this section, within 90 days after receiving an application for a development permit for a qualifying redevelopment project, the county shall: (1) approve or disapprove the application; and (2) notify the applicant of the approval or disapproval in writing. (b) The county shall have an additional 60 days to comply with subsection (a) of this section if: (1) (i) a county unit involved in the review of the application determines that the extension is necessary to complete the review based on: 1. the nature or complexity of the application; or 2. unresolved issues related to the application; and (ii) the county unit notifies the applicant about the extension in writing; or (2) (i) the applicant modifies the application for any reason, including for the purpose of responding to a request from a county unit that is involved in the review of the application; and (ii) the modification is made during the original 90–day period under subsection (a) of this section. (c) In addition to the 60–day extension provided under subsection (b) of this section, the county shall have an additional 30 days to comply with subsection (a) of this section if: (1) the applicant modifies the application for any reason, including for the purpose of responding to a request from a county unit that is involved in the review of the application; and (2) the modification is made during the 60–day extension under subsection (b) of this section.