Structured signal names

Structured signal names

Hello Dear!
In accordance to customer requirement all signal names have to be structured.
And length of each part of signal name should have the same length.
The goal is to have easily reading CEL as shown below:

My Idea is to use "TAB" symbols as separator of signal name part. But I'm afraid it is not allowed to use "TAB" symbols inside signal name.
Another solution is to use "Spaces". But it is not good solution
Could you please propose any solution to meet customer requirements?