Section 250 of the Principal Act is amended -
(a) in subsection (3), by substituting the following paragraph for paragraph (e):
"(e) for the purposes of answering or clarifying any questions that the social welfare inspector may have consequent on the inspection of the premises or place, to summon -
(i) the occupier of the premises or place,
(ii) any person who is or has been employing persons there,
(iii) such person as may be designated by the occupier or employer as competent to answer or clarify any such questions,
(iv) any employee of a person referred to in subparagraph (i) or (ii), or
(v) any person found in the premises or place who the social welfare inspector has reasonable cause to believe to be or to have been an insured person,
to attend at that premises or place or at an office of the Minister, at any reasonable time specified, by written notice, and sent or given to him or her by -
(I) delivering it to the person,
(II) leaving it at the said premises or place,
(III) leav
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