11. However, certain other projects award a flat amount per work unit returned and validated. 12. In any case, work unit approval was necessary for marriage. 13. Work units were the principal method of implementing party policy.14. In 2010, he became Director of the Legislative Works Unit . 15. When asked, some said they had come because their work units had organized the trip. 16. Typically, Sun doubles for people drafted by their work units to meet Beijing's blood quotas. 17. Some work units began selling apartments to workers, and stopped allocating housing to new employees. 18. The conversion of existing industrial space to live-work units or other housing has been controversial. 19. In the cities, old people mostly rely on state pensions from their former work units . 20. To purchase these items, workers had to use coupons they received from their work units .