Subject to / Subjected to
Different formsSubject to states a condition, governing rule or possible exposure; subjected to states that someone or something was made to undergo an experience.
Subject to
Use when
You mean conditional on, governed by, or liable to a rule, approval, charge or possible event.
Example
“Reimbursement is subject to the Director's approval.”
Subjected to
Use when
You mean someone or something was made to undergo or experience a process, treatment or condition.
Example
“The revised system was subjected to penetration testing.”
Quick check
is subjected to approval, subjected to availability, subject to testing when completed testing is meant
Usage note
Subject to testing can be correct when testing is a condition or possibility. Subjected to testing states that the testing was actually carried out.