As suggested, there is no "lock in" period, and if an investor sold, they can sell two ways;
1. to another investor - and that investor can elect to either take up the remaining term of the 10 years or;
2. to a non investor- and the NRAS Participant ( consortium) can either cease operating the incentive ( unlikely) or they can substitute a security ( likely) if a suitable one can be presented to Government, and the substituted security can be sold to an investor who can then utilise the remaining term