Open Access means the non-discriminatory provision for the use of transmission lines or distribution system or associated facilities with such lines or system by any licensee or consumer or a person engaged in generation in accordance with the regulations specified by the Appropriate Commission.

Salient features of OA

Commercial mechanism for transmission pricing for long, medium and short term open access including UI and transactions through exchange.
Approval of open access for the desired quantum and period of supply.
Non-discriminatory open access.
Freedom for scheduling of power.
Freedom to revise the open access or cancellation thereof.
Policies could be different for ‘Advance Scheduling’, ‘Day-ahead Scheduling’ or ‘Booking of Open access’, as the case may be.
Freedom to market that could boost the growth.
Appropriate settlement mechanism.