 Reference to Code Modifications and Equivalency Requirements:

According to International Fire Code (IFC 2021), Section 104.10, modifications may be granted if they meet the intent of the code and do not reduce fire and life safety.

The NFPA 1 (Fire Code) and NFPA 101 (Life Safety Code) also allow modifications under specific conditions, provided safety is maintained.

 Understanding the Exception in the Question:

The question asks for conditions that DO NOT warrant a modification.

Using an alternative building material alone does not justify a modification unless it meets equivalent safety standards.

Code modifications are granted based on maintaining or improving safety, not simply changing materials.

 Clarification of Incorrect Answer Choices:

A. Modification does not lessen health, life, and fire safety → Correct condition for modification, so incorrect answer

IFC 104.10 allows modifications as long as safety is not compromised.

C. Modification is in compliance with the intent and purpose of the code → Correct condition for modification, so incorrect answer

Codes provide flexibility if the intent of fire and life safety is still met.

D. Special individual reason makes the strict letter of the code impractical → Correct condition for modification, so incorrect answer

Some codes allow modifications if strict compliance is impractical, provided alternative safety measures are implemented.

 Conclusion:

The correct and verified answer is B (modification requires the use of an alternative building material) because material substitution alone does not justify a modification unless safety is maintained, as per IFC 104.10 and NFPA standards.