Maryland Code, Tax-Property § 8-420

(a) On or before the beginning of each taxable year and before half-year taxes are due, the supervisors shall prepare and deliver to the collector for each county an assessment roll to be used to prepare the tax roll.

(b) Each assessment roll shall contain for each listed property:

(c) From the assessment roll, the collector shall prepare a tax roll that contains the information from the assessment roll that is necessary to prepare the property tax bill.

(d) If data processing equipment is used to prepare assessment rolls, the property tax rolls and property tax bills shall describe the properties as they are listed in the assessment records.