American National Standard Safety Requirements for Ladder Accessory and OSHA

A person wearing a hard hat and safety harness attaches a Lock Jaw Ladder Grip to a ladder against a building.

The National Standard Safety Requirements for Ladder Accessories ANSI-ASC 14.8-2013. This standard specifies the requirements for ladder accessories under the following categories

General Specifications
Bottom end Accessories
Top End Accessories
Miscellaneous Accessories
Testing Requirements
Labelling,Marking and Instruction Requirements
Labelling Performance Requirements

The standard is intended to provide guidance and design criteria for the construction of ladder accessories.

A person wearing work gloves and jeans climbs a ladder onto a roof under a clear blue sky.

The standard does not outline the criteria for Lock Jaw Ladder Grip however the most relevant section is section 5 General Applications and section 7 Top End Accessories.
The general specifications specifies :
that the design shall have characteristics as to produce a ladder accessory of sufficient strength and stiffness to meet the duty rating of the ladder upon which it is installed.
A quality Assurance Program shall be in place and applied throughout the manufacturing process
Components shall be corrosion resistant
All exposed surfaces should be free from sharp edges
Attachment to the ladder shall shall be designed to prevent failure, crushing, crackling, buckling, fatigue or excessive wear to ladder components
Connections shall be sufficient quality and strength for the purpose intended
Plastic parts should have sufficient strength and rigidity

Many tradesman will complete a Ladder Risk Assessment and use Lock Jaw Ladder Grip to reduce the risks