It shall be lawful for any notary public who is a stockholder, director, officer or employee of a bank to take the acknowledgment of any party to any written instrument executed to or by such bank, or to administer an oath to any other stockholder, director, officer, employee or agent of such bank, or to protest for nonacceptance or nonpayment bills of exchange, drafts, checks, notes and other negotiable instruments which may be owned or held for collection by such bank. It shall be unlawful for any notary public to take the acknowledgment of an instrument executed by or to a bank of which the notary public is a stockholder, director, officer or employee, where such notary is a party to such instrument, either individually or as a representative of such bank, or to protest any negotiable instrument owned or held for collection by such bank where such notary is individually a party to such instrument. Nothing contained in this section shall be construed to prohibit or limit the charging of a notary fee by the notary public who is a stockholder, director, officer, or employee of a bank.