§ 206. Execution of instruments. Whenever the board is authorized or required by law to execute an instrument, such instrument shall be executed by affixing the name of the board and, underneath such name, the signature of one or more of the members of such board or such officer or employee of the state board of real property tax services as may be designated by the board. No acknowledgment of the execution of any such instrument shall be necessary for the purpose of recordation or for any other purpose.