From RS number to session law

The easiest way to learn the Idaho bill process is to follow one bill that made it. House Bill 500 of 2026 was a short, unglamorous traffic bill about bicycles and electric-assisted bicycles. It passed both chambers without a single no vote. That makes it perfect for teaching, because nothing weird happened. Every step you see on its status page is a step nearly every Idaho law takes.

Step 1: an idea becomes an RS

A legislator, an agency, a city association or a citizen group brings an idea to a legislator. Drafting staff at the Legislative Services Office turn it into bill language. Before it is introduced, the draft carries an RS number. HB 500 started life as RS32977, and its statement of purpose still shows both numbers: "RS32977 / H0500."

Joint Rule 18 says no bill can be introduced without a statement of purpose and fiscal note attached. HB 500's statement of purpose was three short paragraphs plus a one-paragraph fiscal note. It said the bill would make clear that drivers must use due care to avoid colliding with riders of electric-assisted bicycles, and that those riders must follow traffic laws. The fiscal note said it had no fiscal impact. Every statement of purpose carries a disclaimer that it is prepared by a proponent and is not an expression of legislative intent. Treat it as the sponsor's pitch.

Step 2: a committee agrees to print it

Most bills in Idaho are introduced by committees. The sponsor presents the RS to a committee, usually in a short hearing, and the committee votes whether to introduce it. This "print hearing" is the first gate, and it is a real one. A committee that refuses to print an RS has stopped the idea before it ever has a bill number.

Once approved, the draft goes to the Chief Clerk of the House or the Secretary of the Senate and gets a number. Joint Rule 17 sets the numbering: House bills start at 1 and Senate bills start at 1001. Joint resolutions, joint memorials and concurrent resolutions are numbered separately. And numbering runs straight through both regular sessions of a two-year legislature, so 2026 bills picked up where 2025 left off. That is why a bill introduced in January 2026 could already be H0500, why you see numbers like S1359, and why a Senate bill never has a number below 1001.

Step 3: first reading, printing, referral

HB 500's history starts on January 20: "Introduced, read first time, referred to JRA for Printing." JRA is the House Judiciary, Rules and Administration Committee, which handles printing for the House. The next day it was "Reported Printed and Referred to Transportation & Defense." Now the bill is a public document anyone can read.

Article III, Section 15 of the Idaho Constitution requires that no bill be put to a final vote until it has been printed for members and read on three separate days in each house. Two-thirds of a house may suspend the three-day rule "in case of urgency." That suspension shows up late in sessions, when leaders rush bills through.

Step 4: the committee hearing

This is where public testimony happens. HB 500 sat with House Transportation and Defense until February 5, when it was "Reported out of Committee with Do Pass Recommendation." Committees can send a bill out with a do-pass recommendation, without recommendation, to General Orders for amendment, or with a do-not-pass recommendation. Or they can simply never vote. The chair's agenda decides.

Step 5: second and third reading, the floor vote

February 6: read second time. February 9: "Read Third Time in Full, PASSED, 68-0-2." That means 68 ayes, no nays and two absent. The bill page lists every name. The floor sponsor, the member who opens and closes debate, was named too. A bill passes with a majority of the members present.

Step 6: the other chamber repeats it

On February 10 the Senate received HB 500, read it the first time and sent it to the Senate Transportation Committee. Do-pass came on February 24. Third reading on March 10: passed 34-0-1. A bill amended in the second chamber must go back to the first chamber, which can agree to the changes or not. HB 500 was not amended, so it went straight to enrolling.

Step 7: enrolling and the governor

An enrolled bill is the final checked copy. HB 500 was reported enrolled on March 11, signed by the speaker, then signed by the president of the Senate, and "Delivered to Governor at 2:30 p.m. on March 13, 2026." The governor signed it on March 16. It became 2026 Session Law Chapter 24.

The governor's options

Article IV, Section 10 gives the governor three choices for an ordinary bill.

Choice	While the legislature is in session	After sine die adjournment
Sign	Becomes law	Becomes law
Veto	Returned with objections to the house where it started; override needs two-thirds of members present in each house	Objections filed with the secretary of state within 10 days after adjournment, Sundays excepted; no override possible unless lawmakers return
Do nothing	Becomes law after 5 days, Sundays excepted	Becomes law if no objections are filed within the 10 days

For appropriation bills the governor has one more tool. Article IV, Section 11 lets him veto individual items. Each vetoed item can be overridden separately, the same way as a bill. In 2026 Gov. Little vetoed five bills after the session ended, according to his office's April 9 release, including two budget bills that moved money between state funds (HB 975 and HB 968). As of October 2026 the Legislature's 2026 vetoes page listed four of the five, each linked to a veto letter, so check both sources.

When the law takes effect

Article III, Section 22 says no act takes effect until 60 days after the end of the session, except in an emergency declared in the law. Idaho Code 67-510 adds a floor: an act takes effect on July 1 of the year of the session or 60 days after the session ends, "whichever date occurs last."

So in a normal year, with sine die in March or April, the answer is July 1. If a session drags into late spring, the 60-day rule takes over. A session that ended on May 15 would push the default to July 14: May 16 through 31 is 16 days, June adds 30 for 46, and 14 more days lands on July 14.

An emergency clause lets the legislature pick an earlier date. It usually takes the form of a final section that opens "An emergency existing therefor, which emergency is hereby declared to exist" and then names a date, often "on and after its passage and approval." HB 500 had an emergency clause too, which surprises people: its clause set the effective date at July 1, 2026, the same date it would have had anyway. Sponsors sometimes use the clause to lock in a specific date. Read the last section of every bill before you tell anyone when it starts.

Tracking a bill yourself

Each bill page on legislature.idaho.gov has the same layout: the bill number and sponsor, a one-line description, links to the bill text and statement of purpose, any amendments and engrossed versions, and a dated history. Learn to read the history line by line. "Filed for Second Reading" means it cleared committee. "Ordered Transmitted to Governor" means it passed both chambers. "Session Law Chapter 24, Effective: 07/01/2026" means it is law.

Watch the suffixes. A bill listed as H 758aaS has been amended, and the S tells you the amendment came in the Senate. S 1359aa was amended in its own chamber. The original text no longer describes what lawmakers voted on, so always open the latest version.