One time training is not sufficient. What about serving of liquor. You are responsible, even if someone else serving. Must maintain adequate signage that warms of hazards of taking part. Contract law Extremely complex - we think we know.
Contract is agreement between two or more entities.
Increasingly important - privatization of services, contracting of services, concessionaire arrangements, instructors. The agreement - objective manifestation of a mutual assent. Agreement is enforceable - once you go beyond negotiating, whether it is verbal or written. Proof is separate case Consideration - must be both ways, doesn't have to be fair. Infants can void contracts without cause, adults can not.