Art. 41. (…) The law shall provide for appropriate programmes and controls so that public and private-sector economic activity may be oriented and co-ordinated for
social purposes. Art. 43. For the purposes of the common good, the law may establish that an enterprise or a category thereof be, through a pre-emptive decision or
compulsory purchase authority with provision of compensation, reserved to the Government, a public agency, a workers' or users' association, provided that such enterprise operates in the field of essential public services, energy sources or monopolies and are of general public interest.