I need to be able to fully screen them based on pre determined criteria.

If somebody else brings the buyer, the listing agent/brokerage will offer a predetermined amount of the commission as on the MLS agreement , usually 2.5% or 3%.When closing occurs, the buyer brings the funds, they are put into escrow, and distributed to the seller less the 6% commission (and other related closing costs).

You could even write a month-to-month agreement, but I think for his purposes he's looking for a pre-determined fixed period of time of 6 months.As to the second part of your question, I'm not 100% sure I understand what you're referring to. 

The degree (Goal) is achieved by taking a series of predetermined classes...in a specific order, with each class leading to the next class (prerequisites) and so on.

Spell this out as specifically as possible--sometimes agreements will be silent on this, other times they will say no commission on fixed options (where the rent is pre-determined and there are no terms to be negotiated, just a letter from the tenant saying they're exercising), other times it specifies that no commission is to be paid on options at all (brokers will make the argument that the tenant exercised its option but rent and concessions were negotiated and the broker did work that they should be compensated for just like a renewal/new deal).

They are usually selling based off a pre-determined cap-rate or return for the end buyer.

,  it is also easy to send out the predetermined response with your tenant criteria and then you can weed out the really casual lookers.

Sec 8 pays their predetermined share, and the tenant pays their share, in money, according to the terms of the agreement with Sec 8. 

I believe that planning to save a predetermined amount of money for your retirement is risky because of inflation, potential changes to the tax code, and the simple fact that you may outlive your savings.

I have to select a predetermined percentage.