Is a flexible water and gas line to a water heater ok in Illinois?

Hi

I live in Itasca, IL a suburb west of Chicago. I attempt to look into the IL code, but could not find any reference to this. I have gas coming out of a black iron gas pipe and water coming out from copper pipe from the roof of the basement.

My questions are:
1. Am I allow to hook up the gas to the water heater using a short length of flexible gas line?
2. Am I allow to hook up the water to the water heater using a short lengh of flexible water line?

Thanks.

Paul

 

Very wordy code....but it does contain provision that a town may issue a permit if "....the applicant is the owner occupant of a single family residence that is the subject of the permit.or that the applicant is the owner occupant of a single family residence that is the subject of the permit."

In perusing the codes briefly, I could not answer the question about whether the code REQUIRES, ALLOWS, or PROHIBITS flexible connectore.
I hope an IL plumber can help us with that.

In CA, flex connecors on gas and water connections are REQUIRED. ​

 

In Illinois the water heater is required that the water pipes and gas to be hard piped. Also unions are required on the water piping. One more thing changing out a water heater requires a licensed plumber to do the job.

 

No straps required unless mounted on a stand in a garage. Tornadoes is our worry in the flat lands here.

 

Sir, I inspect foreclosures in cook county,lake county, and McHenry county for Fannie Mae. They have a plumber going around on the hot water heaters and furnaces using a yellow flexible cord to hook up the gas lines to them. I told them this is against Illinois code and needs to be hard pipe. What is the right way?