§ 1305. Filing and allowance of postpetition claims
(b)
Except as provided in subsection (c) of this section, a claim filed under subsection (a) of this section shall be allowed or disallowed under section
502 of this title, but shall be determined as of the date such claim arises, and shall be allowed under section
502
(a),
502
(b), or
502
(c) of this title, or disallowed under section
502
(d) or
502
(e) of this title, the same as if such claim had arisen before the date of the filing of the petition.
(c)
A claim filed under subsection (a)(2) of this section shall be disallowed if the holder of such claim knew or should have known that prior approval by the trustee of the debtor’s incurring the obligation was practicable and was not obtained.