Find below an advanced list of 22 soccer referee related links (alphabetized).

Websites of Interest

Allows Iowa's Soccer Referees to keep up with all their assignments anytime and now anywhere with their mobile site – [Login here]
AReferee.com
Grade specific Laws of the Game (LOTG) Tests and Daily Quizzes see how well you know the Laws
Ask a Soccer Referee
Provides answers to practical refereeing questions per the Laws of the Game (LOTG) created by Jim Allen and now managed by Dan Heldman.
Iowa Referee Committee (IRC)
Proudly developing referees for the USSF, NISOA, IHSAA / IGHSAU, and AYSO  [Login here]

Ken Aston Referee Society
In honor of Sir Kenneth George Aston, inventor of the Yellow and Red Cards

Iowa Soccer
Information source for State Cup, Iowa Soccer League (ISL), Alliance Premier Leaue (APL), Kohl's American Cup, US Youth Soccer Region 2, College Search Kickoff (CSK), ...
Since 1980, a leading source of sports officiating information, programs and services  – [Login here]
Official Sports International (OSI)
Exclusive referee uniform supplier to US Soccer – complete Referee Starter Kits available – [Login here]
Professional Referee Organization (PRO)
News, features, and information from the organization that provides administration over professional referee programs in North America
Referee Magazine
Well-respected monthly magazine on officiating written by officials, for officials
Referee Instruction Online
Created by CalSouth USSF Instructors and Assessors, this site offers monthly online live classes, webinars, and on-demand recordings for past sessions
Soccer Referee USA
Soccer Blog, Referee Forum, Facebook Group, Quizzes, Library, the Referee Store, and more, ...
SocRef-L LISTSERV
World's biggest soccer referee tent – web portal for discussion of topics for referees from volunteer to amateur to professionals
Fédération Internationale de Football Association (FIFA)
Official site of the Fédération Internationale de Football Association (FIFA) – soccer's governing body
US Soccer Referee Resource Center
Designed to support the Referee Community by providing the most up-to-date information about the US Soccer Referee Program
GameOfficials
GameOfficials™ is the “go-to” assigning technology and has set the standard for providing fast and easy ways to both import and export game information – [Login here]
You are the Ref!
Supplements the standard programs offered by National Federations and provides unrivaled analysis, education, and insight for referees
MLS Instant Replay
Official website of Major League Soccer (MLS) featuring the latest news, highlights, scores, standings, and analysis – Instant Replay is listed in Series & Features under Highlights
US Youth Soccer Region 2
Information on US Youth Soccer programs, events, schedules, news and announcements for Iowa and the Midwest
PRO – Assistant Referees
Home of the Professional Referee Organization's Assisant Referees who work the professional leagues in the United States and Canada – features instructional materials, PRO guidance, and an AR Week in Review
International Football Association Board (IFAB)
The International Football Association Board is the body that determines the Laws of the Game of Association Football and acts as the guardian of the internationally used laws
In the Opinion of the Referee (ITOOTR)
News, case studies, downloads, product reviews, and content designed for today's soccer referees – "Like" the ITOOTR Facebook Page to be informed when new content is posted