Document ID: chunk:federal_register_of_legislation:F2023C00958:reg:7:p10
Version: federal_register_of_legislation:F2023C00958
Segment Type: reg
Provision Reference: reg 7 (pt 10/16)
Character Range: 38325–41466

only when reverse gear is selected emits an intermittent audible signal on a regular time cycle.  It must not emit a signal louder than is necessary to warn persons of the proximity of the reversing vehicle.
20.3.1.                          For vehicles of category MD3 and MD4, and those of category ME, NB and NC, equipped with audible reverse warning devices, approvals to the technical requirements of United Nations Regulation No. 165 – UNIFORM PROVISIONS CONCERNING THE APPROVAL OF AUDIBLE REVERSE WARNING DEVICES AND OF MOTOR VEHICLES WITH REGARD TO THEIR AUDIBLE REVERSE WARNING SIGNAL, incorporating the 00 series of amendments will meet the requirements of clause 20.3.
20.4.                                Retractable Axle Alarm
         Notwithstanding clauses 20.1 and 20.2 a further device must be fitted to vehicles equipped with a 'Retractable Axle' which emits an audible signal on the lowering of the 'Retractable Axle'. It must not be louder than is necessary to warn persons in the proximity of the 'Retractable Axle'.
21.                                      STABILITY REQUIREMENT (LEM, LEP & LEG Vehicles only)
21.1.                                The Static Stability Ratio (SSR) of a three-wheeled vehicle is defined as the ratio of the Centre of Mass (CoM) height (h) (see Figure 3) with the horizontal distance from the CoM to the nearest roll axis (d) (see figure 4a and 4b) under the specified loading state (the 'Maximum Loaded Test Mass').  A roll axis is a line joining the centre-point of each tyre's contact patch (see Figures 4a and 4b).
21.2.                                For LEM1, LEP1 & LEG1 vehicles the SSR shall not exceed 1.0.
21.3.                                For LEM2, LEP2 & LEG2 vehicles the SSR shall not exceed 1.5.
21.4.                                LEM1 vehicles fitted with a rear axle having a 'Differential', excluding those vehicles fitted with a 'Limited-Slip Differential', complying with the technical requirements of the Canadian Motor Vehicle Safety Standard No. 505 Vehicle Stability, current as at 2007, shall be deemed to comply with the clauses 21.2
21.5.                                Test procedure for determining the vehicle's centre of mass
21.5.1.                          Unless otherwise 'Approved', the location of the vehicle's centre of mass shall be determined by the methods described below.  Manufacturers may select between the Stable Pendulum Method (paragraph 21.5.4.) and the Axle Lift Method (paragraph 21.5.6.) for determining the height of the CoM.
21.5.2.                          Transverse location
21.5.2.1.                    The transverse location of the centre of mass can be taken to be located along the vehicle's longitudinal centreline.
21.5.3.                          Longitudinal location (See Figures 3, 4a and 4b)
21.5.3.1.                    The longitudinal location (L) of the centre of mass, from the centre line of the front 'Axle', is determined from the formula
L = WR/(F + R)
         where:
         W is the wheelbase
              R is the rear 'Axle Load' on the tyre(s) with the vehicle in the 'Maximum Loaded Test Mass'