This is part of the optional ARO module.
You may have different accretion rates for different divisions of your company (most commonly, for different countries). Check this box to expand the Accretion Rates table to include a column to specify the group to which a rate applies. Use * for the group name for all groups; select the actual group name to specify a rate for just that group. "Group" can be any one of the user-defined fields. Groups must be chosen from a list; the list of acceptable choices is set up in the UDF Choices tab of System Options. If you set the title of the user-defined field in System Options, that title is used in the checkbox's description.