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Contract Account Category 
A contract account category defines certain attributes for a contract account.
You have to assign a contract account category to each contract account when you create it. The fields that appear when you create a contract account are among the things controlled by the contract account category.
The contract account category determines the following contract account attributes:
· Whether you are allowed to assign only one business partner or more than one to a contract account
· Whether you are allowed to assign only one contract or more than one
· Whether you are allowed to maintain a contract account online
· The number range that is allowed for external or internal number assignment
· Whether it is a collective bill account (industry component Utilities)
· Whether it is a one-time account
· Whether it is a deposit account and the account contains deposit contracts (industry component Insurance)
· The editing screens or data fields that you can use to edit the contract account
