According to the Guide to CRA Data Collection and Reporting, the full amount of the credit line is the amount that is considered originated.
Lines of Credit
Institutions must collect and report data on lines of credit in the same way that they provide data on loan originations. Lines of credit are considered originated at the time the line is approved or increased; and an increase is considered a new origination.
Generally, the full amount of the credit line is the amount that is considered originated. In the case of an increase to an existing line, the amount of the increase is the amount that is considered originated and that amount should be reported. However, consistent with Call Report instructions, if an increase to an existing line would cause the total line of credit to exceed $1 million, in the case of a small business line, or $500,000, in the case of a small farm line, the institution would not report the increase.