New Delhi Competition Appellate Tribunal today served notices to the Competition Commission and the Builders Association of India, on whose complaint the fair trade regulator had imposed a penalty of Rs 6,307 crore on 11 cement firms on charges of cartelisation.

Hearing an appeal by cement companies, including UltraTech and ACC, the tribunal also asked the CCI not to take any coercive action in the matter till October 11, when the COMPAT would next hear the case.