Refuelling Station Installer - Natural Gas (RSI-NG) Certificate

Fast facts

Last verified August 19, 2026 against the sources listed below.

What can a RSI-NG holder legally do in Ontario?

An RSI-NG holder may:

• Install, alter, service, maintain and repair natural gas vehicle refuelling stations

The full scope wording is in O. Reg. 215/01, s. 24, which prevails over any summary.

Is a certificate legally required for gas work?

Under O. Reg. 212/01 (Gaseous Fuels), s. 6 (1), no person may install, alter, purge, activate, repair, service or remove any appliance or equipment used in the handling or use of gas unless they hold a certificate for that purpose. The only exception is working in the physical presence of someone who holds the appropriate certificate.

The requirement is in O. Reg. 212/01, s. 6 (1). Working without the certificate is an offence under the Technical Standards and Safety Act, 2000.

How do you get the RSI-NG in Ontario?

Prerequisite

You must already hold a G.1 or G.2 certificate when you apply (O. Reg. 215/01, s. 12). See the G1 Gas Technician 1 certificate requirements, the G2 Gas Technician 2 certificate requirements.

The training route

1. Complete an approved program at an accredited training provider. Certification requires a TSSA-approved curriculum delivered by an accredited provider (O. Reg. 215/01, s. 5 (1)).
2. Apply for the TSSA certification exam. Your provider submits proof of training; you book through the TSSA Client Portal. The practical assessment stays valid for 12 months after the program.
3. Pass the TSSA certification exam. Each attempt, including rewrites, is billed as a separate exam. Failing three times means completing a full accredited program before another attempt (O. Reg. 215/01, s. 5 (4)).
4. Pay the certificate fee. $136 for the initial certificate (from May 1, 2026, plus HST), per the TSSA Natural Gas & Hydrogen Fee Schedule.

The challenge route

Experienced workers can challenge the exam without formal training if TSSA is satisfied they hold equivalent knowledge and competence (O. Reg. 215/01, s. 5 (5)). The challenge examination costs $255.50, requires documented proof of work experience where the certificate has prerequisites, and still ends in a practical skills assessment.

How often does the RSI-NG need to be renewed?

Every two years. TSSA's fee schedules list the certificate fee as biennial, and the renewal costs $136 (from May 1, 2026, plus HST) with a $50 late payment fee after the renewal date.

Working on an expired certificate is prohibited outright: O. Reg. 215/01, s. 4 (1) says a person who fails to renew shall not do any work under the certificate after expiry. You can still renew up to one year after expiry, completing any upgrading course the director specifies. After one year, the certificate is gone and you start over as a new applicant (s. 4 (5)).

Where the RSI-NG sits in the ladder

The RST-NG is the service-only variant, available from a G.3.

Related certificates and trades

• RST-NG Refuelling Station Service Technician - Natural Gas certificate requirements
• G2 Gas Technician 2 certificate requirements
• H2 Hydrogen Fuel Technician certificate requirements
• All TSSA fuel industry certificates

Official verification sources

• RegulationO. Reg. 215/01, Fuel Industry Certificates (e-Laws)
• Certifying bodyTSSA: Fuels Industry Professional certification
• FeesTSSA Natural Gas & Hydrogen Fee Schedule

How this record is built: scope, prerequisites and renewal law are read directly from O. Reg. 215/01 as consolidated on e-Laws; fees come from TSSA's published fee schedules and the pass mark from TSSA's certification policies. The page is assembled programmatically from those verified facts and reviewed before publishing. Facts not verified against a primary source are marked as not published rather than estimated.