Final answer:
Company ABC should receive a Security Classification Guide (SCG) with their first classified contract, which informs them of the classified information details and required handling procedures as per government classification levels.
Step-by-step explanation:
When Company ABC receives its first classified contract after obtaining a facility clearance, they should expect to receive a Security Classification Guide (SCG) alongside the contract. This document is crucial for delineating the parameters for handling classified information, including what specifically is classified, the reasons why certain information is classified, and at what classification levels such as Confidential, Secret, or Top Secret. Contractors must follow these guidelines in order to properly safeguard the sensitive information as per the government's classification system and to ensure compliance with the National Industrial Security Program.