Contracted out rights are also known as protected rights and include Section 9 (2B) rights and guaranteed minimum pensions. The reason why your contracted out rights fund exists is because you contracted out of the State Earnings Related Pension Scheme, now known as the State Second Pension in the past.
If your fund has contracted out rights, talk to a financial advisor in relation to how your contracted out rights are affected by a transfer. The regulations pertaining to transferring contracted out rights are changing in 2012 which means your advisor must analyse this information when giving advice as well as discussing how a transfer immediately affects you.