I'm not too familiar with the Vancouver Park Board's ruling to end cetacean captivity, but are their only options an all or nothing approach? From what I understand, the controversy was the cetaceans being kept in captivity at the aquarium for display/education purposes, so couldn't they have made a more narrow ruling that made provisions for injured animals found off the coast?
From what I understand their decision was to study one of 4 options and then decide on 1 of them. Those options are:
OPTION1: Call on City Council to include an assent question (plebiscite) in the 2018 municipal election;
OPTION 2: Accept the Vancouver Aquarium’s February 20, 2017 announced plans
As per their announcement in February 2017, the Aquarium has voluntarily agreed to not breed belugas at the Vancouver Aquarium and to phase-out beluga displays entirely by 2029. However, in the meantime, they do intend to incorporate beluga displays in their new Arctic Exhibit starting in 2018/19, as part of their on-site conservation research program. While this does not fully address concerns regarding the other cetaceans in captivity at the Vancouver Aquarium, it is a quick and relatively low impact option to ultimately achieve an outcome.
OPTION 3: Amend the Parks Control By-laws (there’s several scenarios listed here)
OPTION 4: Maintain status quo
So I think it should be possible to make changes/exemptions.