oma[ ], with i = 0..2 * MbWidthC * MbHeightC - 1, shall not be equal to 0 (when present). Rec. ITU-T H.264 (01/2012) The level constraints specified for the Baseline profile in clause A.3 shall be fulfilled. Conformance of a bitstream to the Baseline profile is indicated by profile idc being equal to 66. Decoders conforming to the Baseline profile at a specific level shall be capable of decoding all bitstreams in which profile_idc is equal to 66 or constraint_set0_flag is equal to 1 and in which level and constraint_set3_flag represent level less than or equal to the specified level. A.2.1.1 Constrained Baseline profile Bitstreams conforming to the Constrained Baseline profile shall obey all constraints specified in clause A.2.1 for the Baseline profile and all constraints specified in clause A.2.2 for the Main profile. Conformance of a bitstream to the Constrained Baseline profile is indicated by profile_idc being equal to 66 with constraint_setl_flag b being equal to 1. NOTE - This specification of the Constrained Baseline profile is technically identical to specification of the use of the Baseline profile with constraint_setl_flag equal to 1. Thus, any existing specifications (in other documents that reference this Recommendation | International Standard) that have referred to the use of the Baseline profile with constraint set1 flag equal to 1 should thus be interpreted as continuing in force as being technically identical to referring to the use of the Constrained Baseline profile (without any need for revision of these existing specifications to instead refer explicitly to the use of the Constrained Baseline profile). Decoders conforming to the Constrained Baseline profile at a specific level shall be capable of decoding all bitstreams in which all of the following are true: profile_idc is equal to 66 or constraint_set0_flag is equal to 1, constraint_set1_flagisequal to 1, level ide and constraint_set3_fla represent a level less than or equal to the specified level. A.2.2 Main profile Bitstreams conforming 