German to English Bus/Financial Human Resources CPD for employees

Dear all,

How would you understand this?

DE:
(z. B. in Rente, aktive ATZ, Kündigung, Wechsel in Inaktiv):=> Ziegruppe:
31.03. und 30.06.:
"ja" (wg. ***Stamm unbefristet***), ab 30.09.:
"nein" (wg. Austritt bzw. Wechsel in aktive ATZ bzw. Inaktiv)

EN:
“Yes” (due to ***forming part of the permanent regular workforce***), as from 30/09:
“No” (due to leaving or changing over to participating in active semi-retirement schemes or an inactive status)

Cheers,

Sebastian Witte