However, the page is not initiated until it is determined that both 1) the entire time for the announcement has elapsed from the receipt of the callers call, i.e., {HEAD ~ the time} of {TAIL ~ commencement} of billing has arrived, and 2) the caller remains on the call at that time 
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However , the page is not initiated until it is determined that both 1 ) the entire time for the announcement has elapsed from the receipt of the callers call , i.e. , { HEAD ~ the time } of { TAIL ~ commencement } of billing has arrived , and 2 ) the caller remains on the call at that time
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