§ 212 StGB criminalises sexual acts under the exploitation of a relationship of authority. Sentencing range: imprisonment of up to three years. It is a misdemeanour, not an indictable offence; the sentencing range lies below that of §§ 206, 207 StGB. The protected interest is, according to the prevailing doctrine, the undisturbed sexual development of the minor person within the relationship of authority, not primarily sexual self-determination.
Offence under para. 1 no. 2. Covered is anyone who, “exploiting his position towards a minor person who is under his upbringing, training, or supervision”, performs a sexual act, has one performed on himself, or induces the minor person to perform a sexual act on themselves. Teachers are the classic perpetrator group, alongside coaches, educators, religious-instruction teachers, tutors, boarding-school supervisors, and master craftsmen in an apprenticeship.
“Is under” supervision. What matters is the current supervisory relationship at the time of the offence. A class teacher stands in a supervisory relationship to her pupils during the ongoing school year, a subject teacher to the classes she teaches. With a change of school, with promotion to a class without further teaching, or with graduation, the supervisory relationship ends. With private tutoring and coaching relationships, the supervisory character must be examined case by case; decisive is a position with pedagogical authority and not a merely voluntary accompaniment.
“Exploitation” of the position. Required is a functional connection between the supervisory position and the offence. Where there is spatial-temporal proximity to the teaching or supervisory situation (classroom, school event, training camp, school week away), the exploitation element is regularly fulfilled. With private encounters outside the school, it can have to be examined whether the teacher-pupil relationship provided the relevant grooming context.
The consent of the minor person is irrelevant. This is the central peculiarity compared with §§ 207b, 218 StGB. § 212 StGB protects, in a typifying way, development within the relationship of dependency; an actual agreement by the minor person does not affect criminal liability. Even a longer “relationship” with mutual affection is covered by the offence as long as the supervisory relationship exists.
Limitation. With sexual offences against minors, limitation rests under § 58 para. 3 no. 3 StGB until the victim's 28th birthday; from then on, the five-year limitation period of § 57 para. 3 StGB begins to run. In practice, this means: complaints long after the alleged times of the offence are not rare. The defence must reckon from the outset with the reconstruction of long-past facts, which increases the evidentiary value of contemporary documentation (timetables, class photographs, class registers, digital communication).