§ 101. Construction of terms. Whenever the term public service commission, or board of rapid transit railroad commissioners, or transit construction commissioner, or transit commission, occurs in any law, contract or document relating to a subject or matter jurisdiction whereof was transferred to the board of transportation, or when in any law, contract or document reference is made to such commission, board or commissioner in connection with a subject or matter jurisdiction whereof was so conferred, such term or reference shall be deemed to refer to and include the board of transportation, so far as such law, contract or document pertains to matters which are within the jurisdiction of such board.