A consulted agency shall not charge the lead agency for any costs incurred in complying with WAC 197-11-550, including providing relevant data to the lead agency and copying documents for the lead agency. This section shall not prohibit a consulted agency from charging those costs allowed by chapter 42.17 RCW for copying any environmental document requested by an agency other than the lead agency or by an individual or private organization. This section does not prohibit agencies from making interagency agreements on cost or personnel sharing to provide environmental information to each other.