(a)

that the girl at the time of the commission of the offence was a prostitute, that the person so charged was at the said time under the age of twenty-one years and that it is the first occasion on which he is so charged; or

(b)

that the person so charged was at the said time under the age of sixteen years if the offence was committed in respect of a girl; or

(bA)

that the person so charged was at the said time under the age of nineteen years if the offence was committed in respect of a boy; or

(c)

that the girl or person in whose charge she was, deceived the person so charged into believing that she was over the age of sixteen years at the said time.”.