← ISO 27001 Annex A in plain English

A.5.3 A.5

Organizational / A.5.3

Separating duties so no one person can act unchecked

Think of it likeOne person writes the cheque, another signs it.

In plain English

The family splits sensitive jobs between people, so that no single member can both make a decision and approve it without anyone noticing.

Related CSF and CIS controls (unofficial mapping)