Senator Rob Portman, one of the lead Republican voices for negotiations over an infrastructure nib in the Us Senate, said he supports an subpoena clarifying the intent of a cryptocurrency provision.

In a tweet today, Portman encouraged his colleagues in the Senate to vote on an amendment proposed this week by Ron Wyden, Cynthia Lummis and Pat Toomey that suggests hit the definition of brokers in the infrastructure neb to no longer include developers, miners or blockchain firms in the crypto space.

The senator's stance is somewhat surprising, given he has previously supported the language used in the pecker, saying on Tuesday that the legislation "does not impose new reporting requirements on software developers, crypto miners, node operators or other non-brokers" and calling the section on brokers a "common-sense provision." Ted Cruz, the junior Senator from Texas, also reportedly put forth an amendment to strike the provision.

The beak, HR 3684, includes funding for roads, bridges and major infrastructure projects, equally well as proposes implementing tighter rules on businesses handling cryptocurrencies, expanding reporting requirements for brokers and mandating that digital asset transactions worth more $ten,000 are reported to the Internal Acquirement Service. Majority leader Chuck Schumer is reportedly planning to endeavor to keep the Senate in session — the government body is scheduled to exist in recess from Aug. ix — to vote on central amendments.

While the intent behind the bill seems to require crypto exchanges to written report certain transactions, many lawmakers and opponents to the legislation immediately criticized the language, implying reporting requirements could potentially be extended to developers, node operators and miners.

Related: Ohio senator wants clarity for crypto revenue enhancement reporting in proposed bill

Co-ordinate to digital rights advocacy group Fight for the Hereafter, more than than 9,000 activists take called to voice their support of the amendment proposed by Wyden, Lummis and Toomey. Industry membership body Global Digital Finance also said it would welcome the clarifying language, noting 114 signatories from the crypto and blockchain space had attached their names to a letter expressing support for the subpoena.

Jeff Bandman, a board fellow member of Global Digital Finance, said:

"Bold the subpoena is approved, it would serve to raise revenues from appropriate actors, promote regulatory certainty and let innovators to proceed to develop new fiscal products, many of which could enhance financial inclusion in the U.Southward., without fear of unwarranted taxation liabilities."

The subpoena would require 60 votes to exist added to the legislation. With Portman's back up, the amendment may exist more likely to receive Republican votes in a U.South. Senate separate evenly along party lines.