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9.5.1.2.(2)
OS3
ObjectiveOS3 Safety in Use
Attribution
Application
Application 1: 
Intercommunication between two or more areas that make up a combination room, where the dependent area is a bedroom, in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9].
Application 2: 
This also applies to dwelling units in buildings to which Part 3 applies [see Sentence 1.3.3.2.(1) of Division A for application of Part 3], as stated in Sentence 3.7.1.1.(2).
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Intent
Intent 1: 
To limit the probability that all means of egress from dependent bedrooms in combination rooms will be blocked in case of fire, which could lead to persons being trapped in a bedroom, which could lead to harm to persons.
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