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Editing Contract Relationships 
On the Contract Relationships tab page, you can specify the structure of the master contract for the following features:
The system runs checks when participants are added. You can configure the participant conditions in the product definition of each pool product.
· The corresponding feature is active.
You define the following conditions under Contract Relationships -> Participant Conditions.
· The participant contract is based on a product that is allowed as a participant of the master contract product.
If the Restriction on Participant Products field does not contain defaults in the product definition, contracts of all products are allowed as participants. Otherwise, you can add only the participant contracts that are based on the defined products.
· The number of participants is not less than the minimum number.
· The maximum number of participants has not been exceeded.
If the minimum and maximum numbers are blank in the product definition (= 0), you can add as many participants as required.
· You are allowed to set up hierarchies, which means that you can add several levels of participants below the main contract.
· The participant and contract pool are managed in the same currency.
For more information about the general checks, see the documentation for the following function modules:
¡ BCA_API_CN_POOL_RULES_CHK_POOL
¡ BCA_API_CN_POOL_RULES_CHK_SNGL
¡ BCA_API_CN_ACPOOL_RUL_CHK_POOL
¡ BCA_API_CN_ACPOOL_RUL_CHK_SNGL
¡ BCA_API_CN_ACPOOL_RUL_CHK_END
For more information about the participant conditions, see the documentation for each attribute.

You need to take into account the prerequisites and editing options according to the feature that you are using:
· Editing Contract Relationships for Cash Concentration
· Editing Contract Relationships for Interest Compensation