
    Write a function that validates whether a parking rate code contains a base rate indicator followed by either a double or triple peak multiplier marker in the standardized pricing format. The parking management system uses 'a' to represent the base rate, followed by either two or three 'b' characters to indicate the specific peak pricing multiplier level.
    

    
import re

def text_match_two_three(text):
    """
    Write a function that validates whether a parking rate code contains a base rate indicator followed by either a double or triple peak multiplier marker in the standardized pricing format. The parking management system uses 'a' to represent the base rate, followed by either two or three 'b' characters to indicate the specific peak pricing multiplier level.
    

    """
import re

def text_match_two_three(text):
    """
    Write a function that validates whether a parking rate code contains a base rate indicator followed by either a double or triple peak multiplier marker in the standardized pricing format. The parking management system uses 'a' to represent the base rate, followed by either two or three 'b' characters to indicate the specific peak pricing multiplier level.
    

    """
    patterns = 'ab{2,3}'
    if re.search(patterns, text):
        return True
    else:
        return False