[11] It is then said that s 276 gives the Commission power to amend or avoid a contract for services if it considers it to be unfair; that that would permit the Commission to deal with unfairness in a situation such as this, where there are a number of contracts with a particular employer; and that that supports the contention that s 275 was intended to confer a power to be exercised only upon an industry wide basis. However, as Mr Applegarth for the respondent has pointed out, s 276 plainly has an operation consistently with an operation of s 275 which permits the phrase "class of persons" to be given its ordinary meaning. In the first place s 276 applies only to an individual contract which is unfair; whereas s 275 can apply only where there are a number of contractors having a common attribute and where the contractors would be more appropriately regarded as employees but may apply whether or not their individual contracts are unfair. And secondly, s 276 permits an existing contract to be amended or avoided whereas s 275 permits a declaration that a class of persons, formerly under contracts for services, to be employees with all the benefits which that brings, sick leave, annual leave, parental leave and long service leave being examples.[5] The sections thus apply in different situations and perform different functions.