((a)) The debtor may convert a case under this chapter to a case under chapter 11, 12, or 13 of this title at any time, if the case has not been converted under section 1112, 1208, or 1307 of this title. Any waiver of the right to convert a case under this subsection is unenforceable.
((b)) On request of a party in interest and after notice and a hearing, the court may convert a case under this chapter to a case under chapter 11 of this title at any time.
((c)) The court may not convert a case under this chapter to a case under chapter 12 or 13 of this title unless the debtor requests or consents to such conversion.
((d)) Notwithstanding any other provision of this section, a case may not be converted to a case under another chapter of this title unless the debtor may be a debtor under such chapter.