National Labor Relations Board General Counsel Richard Griffin Jr. this week issued guidance on how the agency will implement its final rule changing the process for filing and processing petitions for union representation of employees, effective for representation cases filed on or after April 14. According to the agency, the guidance is intended to explain, as clearly as possible, how representation cases will be processed from beginning to end, incorporating both the final rule changes and the procedures that remain unchanged. The agency also acknowledges that there may be implementation issues that require subsequent resolution and commits to providing ongoing guidance. The president recently vetoed a congressional joint resolution that would have nullified the final rule. However, the rule remains the subject of two pending legal challenges.