When evaluating RF exposure levels from your station at a neighbor's home, what must you do?
Why FCC RF exposure rules split environments into two categories: controlled, for people who know they are being exposed and can act to limit it (you and your household members), and uncontrolled, for the general public who have no knowledge or control over the exposure. A neighbor falls in the general public category, so your station must meet the uncontrolled limits, which are more restrictive and are averaged over 30 minutes instead of the 6 minutes used for controlled exposure. Also note the acronym stands for maximum permissible exposure, describing what a person absorbs, not what your transmitter emits.
Watch out The controlled-limit choice applies only to you and others at your station who are aware of the RF and can leave; applying those higher limits to a neighbor's home would understate the required separation. The two choices using "emission" misstate the term entirely.
Neighbors are Uncontrolled: they didn't sign up, so the tighter 30-minute limits apply. MPE = Exposure, never Emission.