What's the difference between contract and contract line billing controls?

Contract billing controls restrict the amounts, transaction dates and resources eligible for invoicing or revenue recognition for the entire contract.

For example, if a contract level billing control has a hard limit of 500, the total invoice amount or recognized revenue for the contract cannot exceed 500.

Contract line billing controls restrict the amounts, transaction dates and resources eligible for invoicing or revenue recognition for a specific contract line. Continuing with the example, a contract line has a billing control with the attributes shown in the following table.

Contract Line	Billing Resource	Start Date	End Date	Hard Limit
1	Travel	2/01/2011	3/15/2011	250

Transactions associated with Contract Line 1 are eligible for invoicing or revenue recognition if they are travel expenditures or events with an amount of 250 or less that occurred between 2/01/2011 and 3/15/2011.