एतेष्वर्थाः प्रवर्तन्ते त्रयोदशसु लेखजाः ॥ कZ_०२.१०.२४च्द् ॥
eteṣv arthāḥ pravartante trayodaśasu lekhajāḥ
These meanings/functions operate within the thirteen types that arise in written communications.
A standardized set of communicative purposes/genres for state writing; the surrounding sūtras enumerate and define these functions.