The two postulates of special relativity are

> 
> 1. The laws of physics take the same form in all inertial frames of reference.
> 2. The speed of light in free space has the same value $c$ in all inertial frames of reference
> 
> 
> 

([Source](https://en.wikipedia.org/wiki/Postulates_of_special_relativity))

I recently thought about that they are somewhat similar in that both state that something is the same in inertial frames of reference.

So could the constancy of the speed of light be seen as a special case of the principle of relativity (first postulate) if one considers the speed of light to be some sort of "law of physics"? Does the first postulate imply the second?