Whoever takes, buys, sells, or has in his possession any female lobster bearing eggs shall be guilty of a violation and, in addition, shall be guilty of a violation for each additional oviparous female lobster involved. However, a person who takes any such female lobster and immediately returns it alive to the waters from which it was taken is not subject to the penalty. This section shall not apply to lobsters spawning in cars or pounds, if they are, upon discovery, immediately liberated alive in the coastal waters; nor shall anything herein contained be construed as prohibiting the executive director or his agents from possessing and transporting female lobsters carrying spawn for propagation purposes.