Limiting the portals Choice

[nikosman]

Hi, All

I' trying to implement a solution that manages Insurance Contracts that are considered as Proposition at a first stage.

The number of insurances choice is 6.

Every unique choice generates a proposition that will be sent to the client for approval.

Now , I have a portal showing the Insurances id and Name in a drop down list of the 6 choices.

What I would like is : Once a choice is made, not to be able to add a second choice or modify the choice, that was entered in the Portal, in the first place.

Can some one please help me out with a detailed description of what has to be done?

Thanks in advance and Happy Holidays.

Nikos