The only deemed acceptances in NEC3 are to do with the compensation event process where the PM fails to respond to a notified CE, a quote or fails to make their own assessment (and even then only after a formal reminder and a further two week period of no response).
Lack of response to a communication within the timescale is a compensation event. This is especially important for design as the contract also states the Contractor does not proceed until the design (as required in Works Information) has been accepted. Any cost that the delay in design acceptance causes you (if any) will then be recoverable as part of that CE.
Lack of response to a communication within the timescale is a compensation event. This is especially important for design as the contract also states the Contractor does not proceed until the design (as required in Works Information) has been accepted. Any cost that the delay in design acceptance causes you (if any) will then be recoverable as part of that CE.