Both Hart and Black's fiancee, Rebecca Broxterman, were riding in the vehicle as passengers, police said.
The attorney, Andrew Brettler, told People magazine that Hart will not return to work until 2020.
The CHP accident report, released Thursday and obtained by the Associated Press, also contained additional information regarding the state of Hart's souped-up 1970 Plymouth Barracuda and more specifics about the nature of the accident. Insiders close to the situation revealed that the star was "glad" to get out of the Los Angeles hospital that he called home for 10 days.
The crash occurred on September 1st after Jared, who was driving Kevin's 1970 Plymouth Barracuda in Malibu Hills, Calif, lost control of the auto and veered off the road, landing in a gully after smashing through a wooden fence.
The trio were believed not to be wearing seat belts at the time of the crash.
According to reports, Hart returned to work to promote "Jumanji: The Next Level" earlier this week, but was taking it very slow and easy while he heals. But even if the passengers had been properly strapped at the time of the crash, cops say the belts "were being worn improperly due to excessive slack in the belts", TMZ reported. It said he violated the law, but it didn't say whether he would face charges.
Black made a right turn at about 12:45 a.m. on to Mulholland Highway in the Barracuda that had recently been modified and modernized and had a 6.4 Liter Hemi V-8 supercharged engine, the report said.
It also adds the vehicle was, "not outfitted to carry rear seat passengers", as Kevin replaced the backseats with plastic storage boxes. Hart's friend, Jared Black, was behind the wheel at the time of the accident. First responders had to remove Black and Broxterman, who were trapped inside. It remains to be seen how involved Hart will be in the promotional tour.
Hart, a Philadelphia native who became a standup comedy standout and in recent years has emerged as a major movie star.
The "Jumanji" sequel hits theaters in December.