Permitted by 501.10(B)(2) for locations where flexibility is required. 501.30(B) will require an equipment bonding jumper of the wire type for the LFMC in most cases.
This is a good point; however, technically, if it isn't listed, it isn't LFMC either. See Section 350.6. Various forms of trade named "Sealtight", "Sealtite", "Seal-tite", "Liquid tight" etc. products may or may not be listed, but it must be listed in order to be LFMC.