Section 35(1) in The Indian Post Office Rules, 1933
(1)A parcel shall be packed and enclosed in a reasonably strong case, wrapper, or cover, fastened in a manner calculated to preserve the contents from loss or damage in the post, to prevent any tampering therewith and to protect other postal articles from being damaged in any way thereby.If a parcel contains cloth or woolen material, it must be packed in a strong wrapper with an outer covering of stout cardboard or cloth. Parcels containing articles of great value like gold, bullion, jewellery and the like must be packed in a metal container or a wooden or a stout card-board case according to the nature of the article.
