Here is what I received today on this very issue.
My understanding is that 9014 is for ground level work and 9170 is for everything above the ground.
States Not Applicable: Replaced By:
[ ___ ]MA, OR[ ___ ]
State Exceptions to the National Code:
National-July 2007 Not Applicable
Discontinued: NCCI Schedule and Group:
Not Applicable Schedule 36, Group 360
PHRASEOLOGY JANITORIAL SERVICES BY CONTRACTORS-INCLUDES WINDOW CLEANING ABOVE GROUND LEVEL & DRIVERS Note: Includes inside and outside cleaning of windows above ground level. Window cleaning when performed at ground level to be separately rated as Code 9014. If verifiable records are not maintained, the entire payroll is assigned to the highest-rated classification that applies to the job or location where the window cleaning is performed. Painting, maintenance, or repair at any location where such contractor does not also perform janitorial services to be separately rated. Cleaning service contractors who provide clean-up crews to prepare residential properties for future occupants are classified to Code 9014.
(For reference only. Not to be used for classification of risks for workers compensation purposes.)
Code 9170 is assigned to insureds primarily engaged in providing janitorial services for others. Janitorial services are defined as keeping a building clean by routine dusting, vacuuming rugs, and emptying ashtrays-and/or both keeping a building clean and engaging in various types of maintenance or minor repair work for upkeep of a building.
Stated differently, a risk qualifies as a janitorial service if the risk engages exclusively in cleaning a building or performs maintenance or minor repair operations in addition to cleaning a building.
These maintenance or minor repair operations may include, but are not limited to, painting, cleaning windows, changing light bulbs, assisting occupants in the placement of furniture, replacing glass panes, clearing drains, and cleaning carpets. Code 9014 is not intended for a "specialist" contractor such as a painter, plumber, electrician, or carpenter. These risks are assigned to the code applicable to their operations. Code 9014 is not intended for heavy construction operations conducted by the janitorial risk. Operations such as new construction, structural alterations, or rewiring a building are considered beyond the scope of Code 9014 and are separately classified.
Code 9014 is assigned to specialty contractors engaged in residential or boiler cleaning using vacuum suction equipment; floor waxing or polishing; cleaning or washing of interior walls; cleaning, sanitizing and deodorizing of restrooms; and specialty contractors providing swimming pool maintenance for homeowners.
Related Operations Not Classified to Code 9170:
. Code 9014 Janitorial Services by Contractors-No Window Cleaning Above Ground & Drivers.
CROSS-REF. CHIMNEY CLEANING-RESIDENTIAL-INCLUDES CHIMNEY CLEANING ABOVE GROUND LEVEL & DRIVERS Note: Applies to the cleaning of chimneys by the vacuum suction method above ground level. Chimney cleaning when performed at ground level to be separately rated as Code 9014. If verifiable records are not maintained, the entire payroll is assigned to the highest-rated classification that applies to the job or location where the chimney cleaning is performed.
CROSS-REF. MOBILE POWER OR PRESSURE CLEANING SERVICES-INCLUDES POWER OR PRESSURE CLEANING ABOVE GROUND LEVEL & DRIVERS Note: Applies to the cleaning of building exteriors and equipment using portable water or steam power cleaning systems. Power or pressure cleaning when performed at ground level to be separately rated as Code 9014. If verifiable records are not maintained, the entire payroll is assigned to the highest-rated classification that applies to the job or location where the power or pressure cleaning is performed. Power or pressure cleaning of roofs to be separately rated to Code 5551.