§ 91-a. Customer of record for telephonic blocking and restrictions on the removal of telephonic blocks to certain area codes. Where access to telephone numbers in the 800 and/or 900 area codes has been blocked at the request of the customer of record to prevent the completion of the call to numbers in such area codes, the customer of record may provide a personal password to be retained in the customer's record for purposes of preventing the unauthorized removal of the request for blocking. No telephone corporation shall remove such telephonic block except pursuant to the customer of record providing the correct password, or a request of the customer of record made in writing or in person to such telephone corporation.