Which of the following statements is not true for debt service funds?

A$.$ Special assessment debt for which the government has some obligation is paid through the debt service fund.

B$.$ Interest payable may be reported as a liability of the debt service fund.

C$.$ Bond principal is shown as a liability of the debt service fund only when that principal is due and payable.

D$.$ All tax$-$supported bond principal is shown as a liability of the debt service fund.