2022 Manitoba Workplace Safety and Health Act and Regulation

Personal protective equipment and other control measures
15.10 
When purging, ventilating or both cannot bring the atmosphere
within a hazardous confined space into compliance with clauses
15.9(1)(a) to (c), an employer must ensure that additional control
measures are undertaken to protect the safety and health of the
worker entering the space, including providing to a worker personal
protective equipment appropriate for the conditions in the space.
M.R. 128/2019
Entry prohibited
15.11 
Despite any other provision of this Part, an employer must not
require or permit
(a) a worker to enter a hazardous confined space if the oxygen
content level in the space is above 23%; or
(b) a worker, other than a firefighter responding to an emergency,
to enter a hazardous confined space if a concentration of
a flammable or explosive substance in the space cannot be
reduced to less than 10% of its lower explosive limit.
M.R. 128/2019

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Workplace Safety And Health Regulation
174
Emergency response plan for hazardous confined spaces
15.12 
An employer must ensure that, in the event of an accident or other
emergency at a hazardous confined space, the emergency response
plan and rescue procedures developed under clause 15.2(3)(b) are
implemented.
M.R. 128/2019
Emergency response — top entry into confined space 
15.13(1) When entry into a hazardous confined space or a confined space
is from the top, an employer must ensure that, in the event of an
accident or other emergency within the space,
(a) the worker entering the space and workers carrying out a rescue
use a full body harness and are attached to a lifeline unless
another appropriate personal protective equipment system is
provided;
(b) where a lifeline is used, the lifeline is attended by a worker
who is trained in the emergency response plan and rescue
procedures; and
(c) where reasonably practicable, a personal hoisting device is
(i) available to assist with a rescue, and
(ii) located at the entrance to the space when a worker is in
the space.
15.13(2) Despite clause (1)(a), when the use of a full body harness attached
to a lifeline would create an additional risk to the worker in the
space or would not be reasonably practicable, an employer must
ensure that an alternate method of rescue is available to immediately
remove a worker from the space into which entry is from the top.
M.R. 128/2019