28. Information required by Minister.

For the purposes of controlling and investigating entitlement to any benefit, pension, assistance, allowance or supplement under the Principal Act or under schemes administered by or on behalf of the Minister or the Department of Social Welfare, the Minister may require such persons as may be prescribed to provide him with such information in relation to such persons or classes of persons as the Minister may determine and any person so prescribed shall be required to provide such information as may be required.