A bill to tighten New Hampshire’s voter registration identification requirements – one of the major Republican initiatives of the 2017 legislative session – was quietly signed into law by Gov. Chris Sununu on Monday.The governor’s office included Senate Bill 3 on a list of 18 bills he signed into law. There was no public bill signing ceremony, as had been the case when he signed several other high-profile bills in recent weeks.Later, Sununu said in a statement: "This legislation helps protect the integrity of New Hampshire’s electoral process. As host of the first-in-the-nation primary, New Hampshire has the obligation to ensure our system is beyond reproach. This bill does exactly that and as such, I signed SB 3 into law today.”The signing came amid a related controversy surrounding Sununu’s support for Secretary of State William Gardner’s intention to provide state voter data to President Donald Trump’s Advisory Commission on Election Integrity.That plan may be put on hold, however, pending the outcome of a legal challenge by the American Civil Liberties Union and two state lawmakers. A hearing on the request for an injunction is scheduled for Tuesday afternoon in Hillsborough County Superior Court South in Nashua.Senate Bill 3 will take effect in 60 days. One of the most divisive bills of the session, the bill passed each legislative hurdle along party lines, with Republicans using their majorities to overcome Democratic opposition.Republicans said the bill closes a “domicile loophole,” while Democrats called it a GOP attempt to suppress voting.The new law requires those who register to vote within 30 days of an election or on Election Day to show proof that they live in the communities that they claim as their domiciles. If they do not show documentation, they are still allowed to vote but they must fill out affidavits swearing to their residencies and must follow up with documentation at a later date.If the documents are not provided by the deadline, local officials are empowered under the bill to visit the address provided by the voters to check to see if they are domiciled there or to refer the cases to the New Hampshire Secretary of State’s Office for further investigation.The bill was approved by the state Senate in March. The House made several technical changes to clarify the process and passed its version June 1. A week later, the Senate concurred with the with the House changes.The legislation had the strong support of Democrat Gardner, the longest-serving secretary of state in the nation. He testified during a legislative hearing in March, “You have to try to find the best way to balance that you want as many people as possible to be able to vote, and on the other hand, you want a process that a lot of people trust and believe is working, is right and technically secure.“We’re not denying anyone who shows up at the polls to be able to vote,” he said. “We’re just saying that we want to be able to say that everyone knows that those votes are valid and true. And that helps the turnout, and that’s been our tradition here.”Gardner called Senate Bill 3 a “balancing act of security versus ease.”Also Monday, Sununu signed into law a bill creating a committee to study the rescheduling of local elections in response to confusion that arose out of more than 70 communities' decision to postpone their elections due to a major snowstorm on March 14.The governor's office also announced that on Wednesday he will sign into law a measure partially funding full day kindergarten -- another top Sununu initiative.That signing will take place at the Penacook Elementary School.