Found:

checking domain

**SYNTAX: **Notion in **checking theory**. Informally, the checking domain of a head A consists of everything adjoined to it, and of its specifier(s). Formally, the checking domain of a head A is defined as the **minimal residue** of A. The **residue** of A is its **domain** minus its **complement domain**.
** EXAMPLE:** In the following structure (with a head H adjoined to X), the checking domain of X consists of UP, ZP, WP and H. The checking domain of H is UP, ZP and WP.

XP_{1}/\ / \ UP XP_{2}/\ / \ ZP_{1}X' /\ /\ / \ / \ WP ZP_{2}X_{1}YP /\ / \ H X_{2}

LIT. | Chomsky, N. (1993) |