NEC3 ECC: Notifications are communicated separately. What about other communications?

Clause 13.7 requires that notifications are to be communicated separately from other communications.

Would it be reasonable to request that both parties, us the Client and the Contractor, treat all communications which the contract requires; instructions, certificates, submissions, proposals, records, acceptances, notifications and replies, are similarly required to be communicated separately from other communications?

I would say that it is quite a good idea although not necessarily strictly a contractual requirement to do so. You cant deny every communication that is not communicated separately but certainly practically speaking instructions should definitely be treated as being required separately and should be added to clause 13.7 in future revisions of the contract. Acceptances would be close behind as probably also making sense to be separate.