from typing import List


def get_povm_names_rank1() -> List[str]:
    """Return the list of valid povm names of rank 1.

    Returns
    -------
    List[str]
        the list of valid povm names of rank 1.
    """
    names = [
        "x",
        "y",
        "z",
        "bell",
        "z3",
        "01x3",
        "01y3",
        "02x3",
        "02y3",
        "12x3",
        "12y3",
    ]
    return names