Based on the above information, if the major is housed in the College of Letters and Sciences, an applicant is still admitted Undeclared and will have to complete pre-req course/GPA requirements to declare the major if it is not a High Demand major.
For the High Demand majors, if that major is listed on the UC application and the applicant is admitted, they are guaranteed a spot in the major if they meet the requirements to declare.
Also regarding alternate majors: UC Berkeley’s advice remains that students should select the major they are most interested in as their primary major because the university will only guarantee a review of the primary major, while alternative majors will only be used if space is available, for example, as the university considers available space during the wait list process.