The Clearing House is adding four new seats for credit unions and community banks to its RTP Business Committee and has released a set of business principles outlining how it will manage its real-time payments network, according to an announcement.

Among other things, the newly-released principles state that every federally-insured U.S. depository institution can directly participate in the RTP network in accordance with eligibility requirements. The Clearing House, which is based in New York, N.Y., also said RTP fees will stay flat for all participants regardless of size and will not include volume discounts or minimum volume requirements.

The core payments rail said representatives from credit unions, community banks and corporate end users urged it to share information about the rules during a series of one-on-one meetings and information sessions held over the past year across the country.