What are the two categories of judges mentioned in this section?
The two categories of judges mentioned in this section are:

(a) Chief Justice of a High Court in any Province who has on such commencement become the Chief Justice of the High Court in the corresponding State under clause (1) of article 376.

(b) Any other Judge of a High Court in any Province who has on such commencement become a Judge (other than the Chief Justice) of the High Court in the corresponding State under the said clause.