Section 12(4)(d) in THE COMMISSION FOR AIR QUALITY MANAGEMENT IN NATIONAL CAPITAL REGION AND ADJOINING AREAS ACT, 2021
(d)when a sample is taken for analysis under clause (a) and the person taking the sample serves on the occupier or his agent or person, a notice under sub-clause (i) of clause (c), then, —(i)in a case where the occupier, his agent or person wilfully absents himself, the person taking the sample shall collect the sample for analysis to be placed in a container or containers which shall be marked and sealed and shall also be signed by the person taking the sample; and(ii)in a case where the occupier or his agent or person present at the time of taking the sample refuses to sign the marked and sealed container or containers of the sample as required under sub-clause (iii) of clause (c), the marked and sealed container or containers shall be signed by the person taking the samples,