It shall be unlawful for any beneficial owner, director, or officer directly or indirectly to sell any equity security of such insurer if the person selling the security or his principal:
but no person shall be deemed to have violated this Code section if he proves that notwithstanding the exercise of good faith he was unable to make the delivery or deposit within that time or that to do so would cause undue inconvenience or expense.
(Code 1933, § 56-1603, enacted by Ga. L. 1965, p. 378, § 3.)