This is the 15134th most frequent Russian word.
полноправных
"Полноправных" means "full-fledged" or "having full rights."
Here, 'полноправными' signifies the status of full rights or full membership in an organization.
Эти страны стали полноправными членами организации.
These countries became full-fledged members of the organization.
In this sentence, 'полноправными' describes the employees as having full rights or eligibility to participate in the project.
Наши сотрудники являются полноправными участниками проекта.
Our employees are full-fledged participants in the project.
The term 'полноправное' is used here to qualify the nature of participation as being with full rights or privileges.