Young children and inexperienced swimmers will be banned from the main Olympic pool in the London Aquatics Centre on safety grounds.
The 50m competition pool where Michael Phelps won four gold medals during 2012 is out of bounds to beginners because it has no shallow end.
The majority of the "leisure swimmers" using the complex will be restricted to the practice pool which sits outside the main complex.
The Aquatics Centre, which cost more than £250m to build, is being managed by the London-based leisure company GLL.
The Aquatics Centre opens to the public on Saturday, almost a decade after it was conceived by the award-winning architect Zaha Hadid.