Large parks must be in the state’s “yellow” tier for economic recovery, with the virus largely contained, which could be a long wait.

California health officials issued long-awaited guidance for reopening theme parks in the state on Tuesday, setting targets for when attractions like Disneyland Resort, in Anaheim, and Universal Studios Hollywood, in Los Angeles, can open their doors.

For the big parks, it could be a long road: their counties must reach the least-restrictive “yellow” tier of the state’s four-tier Covid-19 economic-reopening plan.

In terms of coronavirus cases, Orange County, home to Disneyland, is currently in the “red,” or second, tier and Los Angeles County, Universal Studios’ location, is currently in the most restrictive “purple” tier.

It could be months before either county meets the guidelines for the “yellow” tier, which requires there be fewer than one case a day per 100,000 residents and a testing positivity rate of less than 2 percent.

Larger parks, like Disneyland and Universal Studios Hollywood, will have to limit capacity to 25 percent.