However, I’ve tried to make it very clear that there is a very distinct difference in paying additional to a mortgage and paying additional to a HELOC.  

I see similar distinctions  in employment discrimination cases too.  

I want to make a distinction on how property managers get paid; Most are compensated based on COLLECTED rents, while some are paid based on SCHEDULED rents. 

The important distinction here is -- just because I, as a layman, didn't notice something was out of code, doesn't mean it's no longer a code violation.

Forgot to mention that the distinction between meters costing thousands of dollars vs. about a hundred may be whether or not the meters are installed by the utility... where I'm based the public utilities charge an arm and a leg for meter installation, but we are installing our own cold water submeters (upstream of the utility meter) in each unit for somewhere around $200 each I believe (don't have the numbers in front of me), which includes the cost of the wireless transmitters, repeaters, and receiver.

There is definitive distinction between a "support animal" which has not technically been  certified as "service animal".

The phrase "this is a business" and "training your tenant" come up alot in discussions like this.There is a distinction between what that means said to a tenant and what that means when said to a business partner or peer.You want your tenant to understand that phrase to mean they should pay what is due, when it is due or suffer the consequences stipulated in the contract.

@Roy N. that's a very helpful distinction.

I ask 5 distinct questions that must be answered in their response e-mail.  

There's a distinct possibility their parents have no idea you couldn't/wouldn't sue them out of state, and besides, most (not all) parents will do the right thing when it comes to their kids out of a sense of duty and shame, if nothing else.