(a)
“Tentative map” refers to a map made for the purpose of showing the design and improvement of a proposed subdivision and the existing conditions in and around it and need not be based upon an accurate or detailed final survey of the property.(b)
“Vesting tentative map” refers to a map which meets the requirements of subdivision (a) and Section 66452.
Source:
Section 66424.5, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=GOV§ionNum=66424.5..