Some things don't change--like the obligation to work safely:
From the Alberta OH&S Code Part 3

Following specifications

12     An employer must ensure that
(a) equipment is of sufficient size, strength, design and made of suitable materials to withstand stresses imposed on it during its operation and to perform the function for which it is intended or was designed,
(b) the rated capacity or other limitations on the operation of the equipment, or any part of it, or supplies as described in the manufacturer’s specifications or specifications certified by a professional engineer, are not exceeded,
(c) modifications to equipment that may affect its structural integrity or stability are performed in accordance with the manufacturer’s specifications or specifications certified by a professional engineer, and
(d) equipment and supplies are erected, installed, assembled, started, operated, handled, stored, serviced, tested, adjusted, calibrated, maintained, repaired and dismantled in accordance with the manufacturer’s specifications or the specifications certified by a professional engineer.

Manufacturer’s and professional engineer’s specifications

13(1)     If this Code requires anything to be done in accordance with a manufacturer’s specifications, an employer may, instead of complying strictly with the manufacturer’s specifications, comply with modified specifications certified by a professional engineer.
(2)     If this Code requires anything to be done in accordance with manufacturer’s specifications and they are not available or do not exist, an employer must
    (a) develop and comply with procedures that are certified by a professional engineer as designed to ensure the thing is done in a safe manner, or
    (b) have the equipment certified as safe to operate by a professional engineer at least every 12 calendar months.

Certification by a professional engineer

14(1) If this Code requires that procedures or specifications be certified by a professional engineer, the certification must
    (a) be in writing, and
    (b) be stamped and signed by the professional engineer.
(2) Unless the document states otherwise, certification by a professional engineer implies that the procedures or specifications certified are fit and safe for the workers affected by them.

With our in-house engineering team and our CGSB trained inspectors we can fill your certification needs