Section 31
SEC. 31. Indication of Numbers: Certificate of Registration, Professional Tax Receipt, and Accredited Professional Organization (APO) Membership. – A forester’s certificate of registration number and its date of issuance; the current professional identification card’s expiry; the number of the professional tax receipt issued to the forester; the forester’s APO membership number and the date of issuance; and the official receipt number and date of payment, whether annual or lifetime, shall he stated on all documents the forester signs, uses, or issues in connection with the practice of the profession.