18. Any person who travels, stays or engages in an activity in a park shall comply with the list of activities and means of admission referred to in section 14 and with the periods and areas indicated thereon and on the signs unless he has obtained an authorization from the park superintendent under section 15, in which case, the person shall comply with the authorization.
The first paragraph does not apply to members of a Native community referred to in Column I of section 3 of Schedule 1 who engage in an activity for food, ritual or social purposes in a park referred to in Column II, except in a maximum preservation zone.