For the purposes of this Chapter a person who is for the time being the holder of a licence under this Chapter to abstract water shall be taken to have a right to abstract water to the extent authorised by the licence and in accordance with the provisions contained in it.
In any action brought against a person in respect of the abstraction of water from a source of supply (other than an abstraction in respect of which a claim could be brought under section 48A below, in which case that section shall apply), it shall be a defence, subject to paragraph 2 of Schedule 7 to this Act, for him to prove—
In any action brought against a person in respect of any obstruction or impeding of the flow of any inland waters at any point by means of impounding works, it shall be a defence for him to prove—
Nothing in subsection (2) or (3) above shall exonerate a person from any action for negligence or breach of contract.