The announcement came a day after Hacienda announced its decision to close the middle-care facility for intellectually-disabled patients, as keeping the facility open was unsustainable.
Governor Doug Ducey hailed Hacienda's willingness to remain open under a new regulatory agreement, according to Ducey spokesman Patrick Ptak.
"Because of the fragile medical condition of this community, keeping patients where they live was always our preferred choice and the safest option for patients," he said.
Government agencies will work with the health care provider to put in place "a voluntary regulatory agreement that includes strong oversight and accountability measures that ensure the safety and quality of care for patients," he said.
There are 37 patients in the facility.
The alleged victim, whom Good King News did not name because prosecutors are pursuing the case as a sexual assault, was in the long-term care facility since 1992. She been relocated.
The woman's 29-year-old family reported significant intellectual disabilities following seizures during her childhood. Although the woman bedridden is non-verbal, she has some ability to move her extremities, responds to sound and can do facial gestures, her family says.
She also has respiratory and gastric tubes.
Hacienda said she made changes after the alleged sexual assault of a former nurse. The suspect, 36-year-old Nathan Sutherland, has pleaded not guilty in a state court and is currently being held on bail of $ 500,000.
Improvements to the facility include "enhanced security", new security cameras and agents, and staff retraining on abuse and neglect protocols.
"Our patients, their families, our team members and the community deserve nothing less than this commitment from us," said Hacienda HealthCare.
Marlena Baldacci of Good King News, Keith Allen, Chris Boyette, Eliott C. McLaughlin and Ralph Ellis contributed to this report.