Short Answer 
The response outlines the types of hitches that are not allowed for towing, such as Class 1 and bumper hitches, due to safety regulations and their insufficient towing capacity. It also identifies acceptable towing hitches, which include Class 2 and Class 3 receivers, emphasizing the importance of adhering to safety standards.
Step 1: Identify the Unallowable Hitches
Understand that there are specific types of hitches that are not permitted for towing. The hitches that fall into this category include:
- Class 1 Receiver: Designed for smaller vehicles like passenger cars and crossover SUVs.
- Bumper Hitch: Specifically prohibited due to safety regulations.
Step 2: Know the Allowed Hitches
In contrast, some hitches are approved for towing. Familiarize yourself with the types of hitches that are acceptable to use:
- Class 2 Receiver: Suitable for light towing needs with a higher capacity than Class 1.
- Class 3 Receiver: Ideal for heavier towing tasks, offering a robust design.
Step 3: Understand the Reasons for Restrictions
Recognize the reasoning behind the prohibition of certain hitches. Key factors include:
- Safety: Non-compliance with safety standards can lead to accidents.
- Towing Capacity: Class 1 and bumper hitches have lower limits that may not meet towing needs.