The management body, if required by the declaration, by-laws or otherwise, or at the request of a mortgagee or a beneficiary of a deed of trust having a first mortgage or first deed of trust of record covering a unit or any part of the project, shall have the authority and an insurable interest to insure the project or any portion thereof against loss or damage by fire or other hazard or casualty. Such insurance coverage may be written in the name of the management body, as trustee for each of the condominium owners in the percentages established in the declaration or as otherwise provided in the declaration or provided by the management body, and premiums may be treated as common expenses. Provision for such insurance shall be without prejudice to the right of each condominium owner to insure his own unit for his own benefit. This provision shall not be construed to limit the power of such body to secure and maintain other insurance coverage or to treat the cost thereof as a common expense.