Mont. Code Ann. § 30-9A-510
30-9A-510 Effectiveness of filed record
30-9A-510 . Effectiveness of filed record. (1) A filed record is effective only to the extent that it was filed by a person that may file it under 30-9A-509 .
(2) A record authorized by one secured party of record does not affect the financing statement with respect to another secured party of record.
(3) A continuation statement that is not filed within the 6-month period prescribed by 30-9A-515 (4) is ineffective.