Disable MVC Validation based on another fields using Jquery

You can use following to remove all validation rules from an element 

 $('#Password').rules('remove')

To remove specific rule use 

 $('#Password').rules('remove', 'required')

 And to add validation rule 

 $("#Password").rules("add", "required");

 OR

 $("#Password").rules("add", { minlength: 2 });

Also you need to remove validation in Controller's POST action.

ModelState.Remove(field)