(Reuters) -Paul Atkins, the chair of the Securities and Exchange Commission, laid out his vision for overhauling the agency's cryptocurrency policies on Monday, saying he plans to establish guidelines for distributions of crypto tokens that are securities and consider whether additional exemptions are necessary. In remarks made at the outset of a public meeting of the SEC's crypto task force, Atkins also indicated that the SEC may consider tweaking its rules so that registered broker-dealers with an alternative trading system - or ATS - can also facilitate trading in non-securities, such as bitcoin or ether, the two largest cryptocurrencies. "A key priority of my chairmanship will be to develop a rational regulatory framework for crypto asset markets that establishes clear rules of the road for the issuance, custody and trading of crypto assets while continuing to discourage bad actors from violating the law," Atkins said.