(b) Assessment of property. -- The Department of Finance shall assess all property subject to taxation by the County and maintain appropriate records. In the performance of its functions relating to the assessment of property, the Department of Finance shall exercise the assessment functions heretofore assigned to the Board of Assessment. To this end, not later than April 1 of each year, the Department of Finance shall prepare and present to the Board of Assessment Review a copy of the assessment roll for the year. The Department shall determine the form of the assessment roll and shall not be bound by provisions of law heretofore in effect as to form. The Board of Assessment Review or its representatives shall sit in its offices during each secular day from April 1 through April 15 of each year to hear appeals and make additions, alterations or corrections to the assessment that may be necessary. After the closing of the hearings, the settlement of all appeals, and the adjustment of the assessment lists, the Board of Assessment Review shall certify to the Department of Finance a true and correct assessment roll for the year. Not later than May 1 of each year, the Director of Finance shall certify to the county government the total value of all property in the County and the total value of all property which has been assessed and is subject to taxation. The Department of Finance shall determine by rule, the form, number of copies, and other details concerning the keeping of records relating to assessment of real property and improvements thereupon. The Department of Finance shall develop a suitable system for the identification of all real property within the County, both that which is subject to taxation and that which is exempt from taxation. Such system shall be in a form which readily permits the subdivision of property or the reassembly of property without loss of control thereof for purposes of assessment.