What is one cause for which a license may be suspended?

Allowing another person to use a licensed instructor's credentials is a serious violation of the rules governing riding instructors. It falls under the category of unethical conduct, as it jeopardizes the integrity of the licensing system and could potentially endanger students' safety. When a licensed instructor permits someone else to represent themselves as qualified under their credentials, it undermines public trust and accountability in riding instruction. Such actions can lead to significant repercussions, including suspension of the license, since the regulatory body must ensure that only qualified individuals are instructing students. This maintains a standard of safety and professionalism within the riding instruction community.

The other choices do not pertain to the ethical or legal standards expected from licensed riding instructors. Not conducting lessons during specific months, completing less instructional hours than required, or having a poor reputation may impact an instructor's business or effectiveness, but they do not pose the same level of risk to student safety or the integrity of the license as allowing unauthorized use of credentials does.