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Levels of statutory duty
There
are three levels of statutory duty which form a hierarchy of duties. These
levels are used extensively in health and safety statutory (criminal) law but
have been defined by judges under common law. The three levels of duty are
absolute, practicable and reasonably practicable.
Health
and safety foundations
- Absolute duty
This
is the highest level of duty and often occurs when the risk of injury is so
high that injury is inevitable unless safety precautions are taken. It is a
rare requirement regarding physical safeguards, although it was more common
before 1992 when certain sections of the Factories Act 1961 were still in
force. No assessment of risk is required but the duty is absolute and the
employer has no choice but to undertake the duty. The verbs used in the
Regulations are ‘must’ and ‘shall’.
An
example of this is Regulation 11(1) of the Provision and Use of Work Equipment
Regulations concerning contact with a rotating stock bar which projects beyond a
headstock of a lathe. Although this duty is absolute, it may still be defended
using, for example, the argument that ‘all reasonable precautions and all due
diligence’ were taken. This particular defence is limited to certain health and
safety regulations such as The Electricity at
Work
Regulations and The Control of Substances Hazardous to Health.
Many
of the health and safety management requirements contained in health and safety
law place an absolute duty on the employer. The need for written safety
policies and risk assessments when employee numbers rise above a basic
threshold are examples of this.
-Practicable
This
level of duty is more often used than the absolute duty as far as the provision
of safeguards is concerned and, in many ways, has the same effect. A duty that
‘the employer ensure, so far as is practicable, that any control measure is
maintained in an efficient state’ means that if the duty is technically
possible or feasible then it must be done irrespective of any difficulty,
inconvenience or cost.
Examples
of this duty may be found in the Provision and Use of Work Equipment
Regulations (Regulation 11(2) (a and b)) and the Control of Lead at Work
Regulations
where
Regulation 14 states, ‘Every employer who provides any control measure . . .
shall ensure, so far as is practicable, that it is maintained in an efficient
state . . . and in good repair’.
-Reasonably practicable
This
is the most common level of duty in health and safety law and was defined by
Judge Asquith in Edwards v. the National Coal Board (1949) as follows:
‘Reasonably
practicable’ is a narrower term than ‘physically possible’, and seems to me to
imply
that computation must be made by the owner in which the quantum of risk is
placed
on
one scale and the sacrifice involved in the measures necessary for averting the
risk (whether in time, money or trouble) is placed in the other, and that, if
it be shown that
there
is a gross disproportion between them – the risk being insignificant in
relation to the
sacrifice
– the defendants discharge the onus on them.
In
other words, if the risk of injury is very small compared to the cost, time and
effort required to reduce the risk, then no action is necessary. It is
important to note that money, time and trouble must ‘grossly outweigh’ not balance
the risk. This duty requires judgement on the part of the employer (or his
adviser) and clearly needs a risk assessment to be undertaken with conclusions noted.
Continual monitoring is also required to ensure that risks do not increase.
There are numerous examples of this level of duty, including the Manual
Handling Operations Regulations and The Control of Substances Hazardous to
Health.