FECA Coordinated Expenditure Limits
Coordinated or "On behalf of" [O.B.O.] expenditures are funds that are spent by party committees in connection with the general election campaign of a candidate for federal office. These expenditures are not considered contributions because they are not given directly to the candidate or his/her committee, but rather are spent on his/her behalf.
The limits are dependent upon the office, and are based on formulas that use the voting age population [VAP]: