Expires vs max-age, which one takes priority if both are declared in a HTTP response?

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See this answer:

Difference between three .htaccess expire rules

If a response includes both an Expires header and a max-age directive,
the max-age directive overrides the Expires header, even if the
Expires header is more restrictive. This rule allows an origin server
to provide, for a given response, a longer expiration time to an
HTTP/1.1 (or later) cache than to an HTTP/1.0 cache. This might be
useful if certain HTTP/1.0 caches improperly calculate ages or
expiration times, perhaps due to desynchronized clocks.

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