−Removed: Offices and Facilities
−Removed: We lease office space in Greenwood Village, Colorado for our corporate headquarters and primary laboratory comprising approximately 21,000 square feet.
−Removed: We also lease or own manufacturing, storage and distribution facilities in Louisiana.
−Removed: Our manufacturing plant is located on approximately 59 acres and the remaining facilities are comprised of a total of approximately 310,000 square feet.
+Added: Office and Facilities
+Added: We lease approximately 24,000 square feet of office space in Greenwood Village, Colorado for our corporate headquarters and primary research and development laboratory.
+Added: We own our manufacturing plant, which is located on approximately 59 acres in Coushatta, Louisiana.
+Added: We also lease 6.9 acres in Natchitoches Parish, Louisiana where we operate a manufacturing and distribution facility.
+Added: The APT segment of our business utilizes all of our office and facilities space.
+Added: The APT segment of our business utilizes all of our mining and mining-related properties.
As of December 31, 2021, we owned or controlled primarily through long-term leases approximately 4,425 acres of coal land for surface mining.
7 unchanged sentences
In most cases, the prepaid royalty amount is applied to reduce future production royalties.
−Removed: The remaining 2,590 acres (of 4,570 acres of coal land for surface mining) were acquired on September 30, 2020 and located in Harrison and Panola Counties, Texas.
+Added: The remaining 2,450 acres (of 4,425 acres of coal land for surface mining) pertain to the Marshall Mine, which is located in Harrison and Panola Counties, Texas.
Mining operations on this land ceased in the third quarter of 2020.
−Removed: In 2018, the SEC issued new rules for disclosures under this Item for mining registrants.
−Removed: These rules amend Item 102 of Regulation S-K under the Securities Act and the Exchange Act and rescind Industry Guide 7 to direct mining registrants, and create a new subpart of Regulation S-K, which contains all of the requirements for property disclosures by mining registrants from and after January 1, 2021 (the "Mining Disclosures").
−Removed: The Mining Disclosures became effective on February 25, 2019 and allow mining registrants a transition period through January 1, 2021 to comply.
−Removed: We elected to adopt the Mining Disclosures effective February 25, 2019 and were subject to the requirements effective with the filing of our Annual Report on Form 10-K for the fiscal year ended December 31, 2018.
−Removed: Based on the materiality and the vertically-integrated company guidelines contained in the Mining Disclosures, we have concluded that no additional disclosures related to our mining operations are required under this Item.
+Added: Based on the materiality and the vertically-integrated company guidelines contained in Regulation S-K of the Securities Act and the Exchange Act, we have concluded that no additional disclosures related to our mining operations are required under this Item.
Compared sentence by sentence after normalising whitespace, quotation marks, case and digits, so re-formatting and restated figures do not read as changed language. Wording changes appear as one removal and one addition. The current filing and the prior one are authoritative.