owner , in relation to a work, means the actual or reputed owner of the work or that owner’s agent or mandatary. It includes a person who is in possession or claiming ownership of the work and a person who is authorizing or otherwise responsible for the construction, placement, alteration, rebuilding, removal, decommissioning, repair, maintenance, operation, use or safety of the work. It also includes a person who proposes to construct or place a work. (propriétaire)
person in charge , with respect to an obstruction, includes the owner of the obstruction and, in the case of a vessel, or part of one, that is an obstruction, the registered owner or other owner at the time the obstruction was occasioned, as well as the managing owner, master and any subsequent purchaser. (responsable)