Then the permit is invalid. The review and issuance of the permit was based on a specific site of a specific date. With notice, the date can be changed, however the location cannot change without consultation and review.
If unpredictable wind direction is the issue, the ‘competent operator’ can submit two locations at the time of making application, one site being designate as the prime site (prevailing winds); the other site being designated the alternative site (non-prevailing winds).