Section 18b of the Act on the Residence, Economic Activity and Integration of Foreigners in the Federal Territory contains the next text:
A foreigner who has successfully completed his studies at a state or state-recognised university or a comparable educational institution in the federal territory shall be granted a permanent settlement permit, if (1..3 omitted) and 4. the requirements of Section 9 (2), sentence 1, nos. 2 and 4 to 9 are met; Section 9 (2), sentences 2 to 6 shall apply accordingly.
Section 9(2) consist of: (it's not necessary to read them all)
(2) A foreigner shall be granted a permanent settlement permit if
he has held a temporary residence permit for five years,
his subsistence is secure,
he has paid compulsory or voluntary contributions into the statutory pension scheme for at least 60 months or furnishes evidence of an entitlement to comparable benefits from an insurance or pension scheme or from an insurance company; time off for the purposes of child care or nursing at home shall be duly taken into account,
granting such a temporary residence permit is not precluded by reasons of public safety or order, according due consideration to the severity or the nature of the breach of public safety or order or the danger emanating from the foreigner, with due regard to the duration of the foreigner’s stay to date and the existence of ties in the federal territory,
he is permitted to be in employment, if he is in employment,
he possesses the other permits required for the purpose of the permanent pursuit of his economic activity,
he has sufficient command of the German language,
he possesses a basic knowledge of the legal and social system and the way of life in the federal territory and
he possesses sufficient living space for himself and the members of his family forming part of his household.
What does 18b #4 mean exactly? Which paragraphs one should satisfy? All from 1 to 9? Why then phrases from 18b are so complicated?