The Michigan bill does have ratios:
http://www.legislature.mi.gov/docume...7-HIB-4339.htm
Within 3 years after the effective date of the amendatory act that added this section, a hospital's staffing plan shall incorporate, at a minimum, the following direct care registered professional nurse-to-patient ratios for each of the corresponding units:
(a) Critical care - adult or pediatric: 1 to 1.
(b) Operating room: 1 to 1.
(c) Labor and delivery:
(i) During second and third stages of labor: 1 to 1.
(ii) During first stage of labor: 1 to 2.
(iii) Intermediate care newborn nursery: 1 to 3.
(iv) Noncritical antepartum patients: 1 to 4.
(v) Postpartum mother baby couplet: 1 to 3.
(vi) Postpartum or well-baby care: 1 to 6.
(d) Postanesthesia care unit: 1 to 2.
(e) Emergency department:
(i) Nontrauma or noncritical care: 1 to 3.
(ii) Trauma or critical care patient: 1 to 1.
(iii) One r.n. for triage.
(f) Stepdown: 1 to 3.
(g) Telemetry: 1 to 3.
(h) Medical/surgical: 1 to 4.
(i) Pediatrics: 1 to 4.
(j) Behavioral health: 1 to 4.
(k) Rehabilitation care: 1 to 5.
(5) Except as otherwise provided under this subsection, in computing the registered professional nurse-to-patient ratio required under subsection (4), the hospital shall not include a registered professional nurse who is not assigned to provide direct patient care in that unit or who is not oriented, qualified, and competent to provide safe patient care in that unit.