The 20,000 people who missed out on London 2012 tickets in the first two rounds of sales will be given priority when 900,000 more tickets go on sale at 11am on Friday next.
They will have 31 hours' exclusive access to the tickets before another one million people who were unsuccessful in the first ballot last year will then have a five-day sales period to try to buy tickets on a first-come, first-served basis.
Each person will be limited to applying for one session and a maximum of four tickets.
For the first time, 70,000 Olympic Park tickets will be sold which will allow access to the Park to watch sport on the big screens but not to any actual sessions events. Those tickets will be £10 or £5 for those aged 16 or under or 60 or over.
The 20,000 people who missed out completely in the sales rounds in March and June last year will get first bite - and will have a chance of tickets for all events including a limited number for the opening and closing ceremonies will be included. They will be informed by organisers via email.
After that, the one million people who applied in the initial ballot but were unsuccessful will have tickets released for different sports over five days.
These are:
13 May: (all from 11am) hockey, tennis, wrestling (freestyle), wrestling (Greco-Roman), beach volleyball and football.
14 May: athletics (race walk), athletics (marathon), canoe slalom, canoe sprint, shooting, swimming, volleyball, weightlifting and cycling (track).
15 May: equestrian (dressage), equestrian (eventing), equestrian (jumping), diving, synchronised swimming, handball, table tennis, swimming (marathon) and water polo.
16 May: basketball (North Greenwich arena sessions), badminton, sailing, gymnastics (artistic), gymnastics (rhythmic), gymnastics (trampoline), judo, taekwondo, boxing and fencing.
17 May: archery, basketball (Basketball Arena sessions), cycling (BMX), cycling (mountain bike), cycling (road), modern pentathlon, rowing, triathlon and Olympic Park tickets.
