Class H: Government & Related services
- 830 : Power and Telecommunication Lines
- 833 : Electric Power Generation
- 838 : Natural Gas Distribution
- 851 : Homes for Nursing Care
- 852 : Homes for Residential Care
- 857 : Nursing Services
- 858 : Group Homes
- Homes for Persons with Physical Disabilities Amendment/07 (H-858-01)
- Homes for Persons with a Developmental Disability Amendment/07 (H-858-02)
- Homes for Persons with a Mental Health Disability Amendment/07 (H-858-03)
- Homes for Emotionally Distressed Children (H-858-04)
- Homes for Alcohol or Drug Dependent Persons (H-858-05)
- Homes for Children in Need of Protection (H-858-06)
- Homes for Single Mothers (H-858-07)
- Other Institutional Health and Social Services (H-858-08)
- 861 : Treatment Clinics and Specialized Services
- Drug Addiction and Alcoholism Treatment Clinics (H-861-01)
- Health Rehabilitation Clinics (H-861-02)
- Public Health Clinics and Community Health Centres (H-861-03)
- Other Non-institutional Health Services (H-861-04)
- Child Daycare and Nursery School Services Amendment/07 (H-861-05)
- Life Skills Training Facilities Amendment /09 (H-861-06)
- Social Rehabilitation Services (H-861-07)
- Crisis Intervention (H-861-08)
- Other Non-institutional Social Services (H-861-09)
- 875 : Professional Offices and Agencies
- Child Welfare Services (H-875-01)
- Family Planning Services (H-875-02)
- Meal Services (non-commercial) (H-875-03)
- Offices of Physicians (H-875-04)
- Offices of Dentists (H-875-05)
- Offices of Chiropractors and Osteopaths (H-875-06)
- Offices of Nutritionists and Dietitians (H-875-07)
- Offices of Physiotherapists and Occupational Therapists Amendment/07 (H-875-08)
- Offices of Optometrists (H-875-09)
- Offices of Podiatrists and Chiropodists (H-875-10)
- Offices of Denturists (H-875-11)
- Offices of Other Health Practitioners (H-875-12)
- Offices of Psychologists (H-875-13)
- Offices of Social Workers (H-875-14)
- Offices of Other Social Service Practitioners (H-875-15)
- Medical Laboratories (H-875-16)
- Diagnostic Laboratories (H-875-17)
- Combined Medical and Radiological Laboratories (H-875-18)
- Public Health Laboratories (H-875-19)
- Blood Bank Laboratories (H-875-20)
- Other Health Laboratories (H-875-21)
- Health Care and Public Safety Promotion Associations and Agencies (H-875-22)
- Health Care Standards Agencies (H-875-23)
- Health Care Research Agencies (H-875-24)
- Social Service Planning and Advocacy Agencies (H-875-25)
- Other Health and Safety Service Associations and Agencies (H-875-26)
