"(d) Exercise Period The New Options are exercisable at any time...

"(d) Exercise Period The New Options are exercisable at any time on or prior to the Expiry Date (Exercise Period).

(e) Notice of Exercise The New Options may be exercised during the Exercise Period by notice in writing to the Company in the manner specified on the New Option certificate (Notice of Exercise) and payment of the Exercise Price for each New Option being exercised in Australian currency by electronic funds transfer or other means of payment acceptable to the Company."