प्रवीरे वास्तुनि राजनिवेशश्चातुर्वर्ण्यसमाजीवे ॥ कZ_०२.४.०६ ॥
pravīre vāstuni rājaniveśaś cāturvarṇyasamājīve
In the foremost/central site (pravīra vāstu), the royal residence should be established, together with the livelihood-organization of the four social orders (cāturvarṇya).
It centralizes command-and-control, shortens response time for security and administration, and makes authority spatially legible.
As a settlement-ordering principle: allocating quarters/occupations supports predictable taxation, labor organization, and public order.