According to most Usul scholars, the command that established the original duty also establishes its Qada. A separate new command is not needed for the rational-equivalent cases being discussed.
For a missed timed act, two things must be separated:
• the act owed remains outstanding;
• its original time-quality cannot be reproduced.
The demand for the original time falls away, but the duty's equivalent remains due. This is a majority position, not a claim that every scholar agreed. A different restriction applies to substitutes whose equivalence requires a specific text.
- Does Qada Need a New Command?