# COMAR Title 09 — Maryland Department of Labor

## Subtitle 12 — Division of Labor and Industry

### Chapter 56 — Maryland Swimming Pool and Spa Standards

#### Regulation .04 Definitions.

*COMAR 09.12.56.04*

“Substantial and material structural change” means an alteration or repair that:

A. Increases the volume of the swimming pool or spa by 15 percent or more; or

B. Decreases the flow capacity of the swimming pool or spa by 15 percent or more.