Regulation 6: Provide help properly
Helping fellow students who have gotten stuck is a positive, educational experience for both students providing help and those receiving it – if it is done correctly.
Students are encouraged to discuss problems among themselves; explaining a solution to someone who has not yet understood some important aspect is valuable for one's own learning.
In the same way as those seeking help in solving an assignment should do so in order to increase their understanding (Regulation 2), the person providing help should do so for the purpose of helping the person understand the problem (not to quickly and easily complete the task).
It is therefore not permissible to deliberately allow other students to copy your own text or programming code.