State Government
(1) Parliament may by law establish a common High Court for two or more States, or for two or more States and a Union Territory. (2) For such a common High Court, references to the "Governor", "Legislature", etc. in related articles are construed relative to the State where the subordinate courts are situated, or the State where the High Court's principal seat is located (with the President/Union standing in if that principal seat is in a Union Territory).
This is the constitutional basis for a single High Court serving multiple states at once, rather than each state necessarily needing its own separate court - a practical arrangement especially useful for smaller states or Union Territories.
The Punjab and Haryana High Court (serving both Punjab and Haryana, plus Chandigarh) and the Gauhati High Court (historically covering several northeastern states) are real-world examples of common High Courts established under this article.