The corporation does not maintain the current index of records specified in RCW 42.17.260(2). The corporation has determined, pursuant to RCW 42.17.260(3), that compliance with RCW 42.17.260(2) would unduly burden the corporation because there are a very large number and variety of documents involved in planning and constructing the state convention and trade center which would have to be indexed under RCW 42.17.260(2), and because the corporation has only a limited permanent staff. The corporation shall make available for public inspection and copying all indexes maintained by the corporation for its use.