According to definitions provided by DTCC: Securities subject to a Deposit Chill are locked from any deposit activity in the Depository Trust Company (DTC). For securities subject to a Global Lock, all possible chills are applied to the respective CUSIP1.
DTC Eligibility means that a public company's securities are able to be deposited through DTC. DTC is the largest securities depository in the world and holds over thirty-five trillion dollars worth of securities on deposit. DTC accepts deposits of securities from its participants only, who are usually clearing firms.