Most of the rules to which you refer have been motivated by the desire to catch people using televisions without a licence i.e its revenue related.
Policemen have no powers in relation to the WT Act. They may accompny RA Inspectors who are the ones with the authority.
It is not illegal to own a receiver or to use it. The deliberate reception of a signal not intended for you is illegal, designed to stop you listening to the authorities and telephone messages, but, if you don't tell anyone or act upon it how will they know? (keep the volume down!)