(2) Where, in the course of opening and examining any article under ​subsection (1)​, the controller or authorised officer finds any publication that he believes on reasonable grounds to be obscene or objectionable — he may detain the article for so long as is necessary to institute proceedings for an offence under this Act; or where no such proceedings are instituted within 3 months of the detention, he may return the article to the sender of the article or, if the publication is obscene or objectionable or returning the article is not reasonably practicable, he may, subject to ​section 20​, destroy or cause to be destroyed the article or the contents of the article consisting of any such publication. [10 [  9​ /98]​ Examination of persons entering Singapore, etc.  16. —​(1) Any importer and any person entering Singapore shall, if he is required to do so by a controller or any authorised officer — declare whether or not he has imported or has in his possession any publication; and produce the publication for examination. [  9​ /98]​ (2) A controller or an authorised officer may — examine or search any person entering Singapore or any article which an importer has imported or a person entering Singapore has in his possession for the purpose of ascertaining whether the importer or person has imported or has in his possession an obscene or objectionable publication; and detain any such publication produced or found upon the examination or search as the controller or authorised officer believes on reasonable grounds to be obscene or objectionable. [  9​ /98]​ (3) Any publication detained under s​ ubsection (2)(b)​ may be detained for so long as it is necessary to institute proceedings for an offence under this Act or, where no such