Belmont cragin, gas meters code

[Alejandro Ferrer]

Hello biggerpockets community. I just recently purchased my first house hack, a 4 unit (2 floors- 2 units front and 2 units rear) building in the Belmont cragin area. The property has two gas meters. 1 for the 2nd floor and the other for the 1st floor. My question is, should I separate the gas meters or charge a little more on the rent to cover that expense which I will be paying, Is there a code for the area that says I can’t have two meters for all 4 units? Should I see if paying to separate will be too much,if not will I make my money back after raising rents? Should I have someone from comed do the change or a contractor add a sub meter?. Tenants are paying way below market rates and don’t pay utilities which will change once I make leases. 

Thank you guys.