382 A Shared Subscription comprises a Topic Filter and a Subscription Options.

and Subscription Options

This is a bit of a run-on sentence:

382 ... A Shared Subscription can
383 be associated with more than one Session and an Application Message that matches a Shared
384 Subscription is only sent to the Client of one of these Sessions.

how about:

A Shared Subscription can be associated with more than one Session.
An Application Message that matches a Shared Subscription is only sent to the Client of one of these Sessions.