Rule 2A [ Evidence of plans, photographs etc.

Unless, at or before the hearing [^f1 the judge or district judge as the case may be] for special reasons otherwise orders, no map, plan or other drawing, photograph or model shall be receivable in evidence-at the hearing of any proceedings unless at least 3 weeks before the commencement of the hearing the parties, other than the parties producing it, have been given an opportunity to inspect it and to agree to its admission without further proof.

Any order under this Rule (including an order made on appeal) may, on sufficient cause being shown, be revoked or varied by a subsequent order of [ the judge or district judge as the case may be] made at or before the hearing.