16.4  Compliance with Instructions

The Service Provider shall:

(a)  not be obliged to comply with any instruction of the Authority given pursuant to clause 16.3, if it is likely, in the reasonable opinion of the Service Provider, to give rise to a breach of clause 16.1; and

(b)  immediately provide the Authority with full details of why such breach would occur together with details of the Service Provider's proposals for carrying out the Authority's instruction in an alternative way which, in the Service Provider's reasonable opinion, would not give rise to a breach of clause 16.1.