‘Provision’, ‘criterion’ or ‘practice’ are not defined in the Act but can be interpreted widely and include: arrangements (for example, for deciding who to admit); the way that education, or access to any benefit, service or facility is offered or provided; one-off decisions; proposals or directions to do something in a particular way. 

They may be written out formally or they may just have developed as you have worked out the best way of achieving what it wanted to do. 

There are two ways you can tell us what happened