Nonces in Origin-CSPs

[36dos]

Are nonces going to be added to CSPs deployed in origin manifest ? If so, will there be a mechanism for the browser to refresh the nonces in the origin-CSP and the nonces in the script tags of webpages where the CSP is applied ? If not, is it better rather deploy an additional nonced-CSP to webpages (as a header), in addition to the origin-CSP without nonces added to the manifest ?

[Sora2455]

Considering that Origin Policies are meant to be cached and re-used across requests, and nonces become worse than useless if reused across requests, I don't see how you could use nonces in an origin policy.