Other base elements in the project that involve the client may also be discussed at this meeting (schedule, status reporting, etc.).
If there are any new team members, the process to be followed is explained so as to maintain quality standards of the organization.
If the legal permissions are not mentioned by the concerned stakeholder during kickoff, the test may get modified later to comply with local traffic laws (this causes unplanned delay in project implementation).
So, it would be best to have a discussion about this during the kickoff meeting and to follow it up separately, rather than to proceed on assumptions and later be forced to replan test procedures.
By displaying a thorough knowledge of the goal and steps on how to reach it, the customer gains confidence in the team's ability to deliver the work.