Final answer:
A violation involving drugs or alcohol can lead to either the suspension or revocation of a professional license. The executive officer of the board may have the authority to take immediate summary action against the license.
Step-by-step explanation:
A violation involving drugs, alcohol, or both can result in disciplinary action against a professional license. Depending on the severity of the violation and the applicable laws and regulations, this could mean to either suspend a license temporarily or to revoke a license permanently. Furthermore, in some cases, an executive officer of a board has the authority to issue summary actions against a license before a formal hearing, such as immediate suspension in cases where the public's health, safety, or welfare is at serious risk.