Any affirmation submitted pursuant to these rules shall be signed and shall state “I affirm under penalties of perjury under the laws of New York, which may include a fine or imprisonment, that the foregoing is true, and I understand that this document will be filed in a proceeding before the Public Employment Relations Board.” The board will prescribe forms consistent with this section. Any requirement in this Chapter for an affirmation may alternatively be satisfied by submitting a writing signed and sworn to before any person authorized to administer oaths.