Important matters listed for hearing in the Delhi High Court on Friday, December 19: *Order on TMC MP Mahua Moitra's plea against Lokpal order granting sanction to CBI to file chargesheet against her in the alleged cash for query scam.

*Plea by InterGlobe Aviation, which operates IndiGo airline, seeking refund of over Rs 900 crore paid as customs duty on aircraft engines and parts re-imported into India after overseas repairs.

*AAP leaders Arvind Kejriwal and Manish Sisodia's plea challenging summons issued to them by the Delhi Legislative Assembly's Privilege Committee over the 'phansi ghar' controversy. PTI SKV SKY SKY

Lokpal sanction, customs duty refund claim, and legislative privilege summons are scheduled for hearing Friday. Three matters include: a challenge to Lokpal-authorised sanction allowing CBI to file a chargesheet in an alleged cash-for-query case (sanction for prosecution); an airline's claim for refund of over Rs 900 crore customs duty on engines and parts re-imported after overseas repairs (customs duty refund on re-importation); and a challenge to legislative Privilege Committee summons over the 'phansi ghar' controversy (legislative privilege and scope of summons).