Always check the most current revision of the ANSI A156.19 standard for recommendation or requirement of the location of a Knowing Act switch.
2019 ANSI A156.19 states the requirement of the Knowing Act Switch Location as follows:
When a knowing act switch is used: it shall be installed in a location within view of the door; have an installation height of a minimum of 34 in. and a maximum of 48 in., or as specified by the local building codes; shall remain accessible from the swing side when the door is opened; and shall not be located in a position where the user would be in the path of the moving door. If located seven feet or more from the center of the door, there shall be an additional time delay of two seconds for each additional foot.
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