A lobbyist is someone who seeks to promote, oppose, or otherwise influence the outcome of a decision maker.
Various provincial and federal laws regulate lobbying activity.

Some provinces set limits on how much money a lobbyist can spend wining, dining and otherwise influencing province officials and laws under consideration. For example, some provinces require individual lobbyists plus the companies that employ them to register with the federal, provincial, and or province Department of justification within a certain time period from taking a job to influence the legislature.