Though no limitation is specially prescribed for security interest, where the limitation period for the principal creditor ends, the security interest shall expire no matter it is offered by the third party or the debtor or it is transferable possession or nontransferable possession.

The essay emphasizes on the limits on collaterals,publicity of security interests,priority rules among the completing rights on t.

In practice,tax priority usually conflict with other priorities and guarantee real rights when we must follow the solution that tax priority should precede other priorities of public law claim on.

The priority of obligatory right is not guaranty real right,which lies in the fact that the priority of obligatory right is generated from social policy,and that the priority of obligatory right is not the same to guarantee real right in essence.

As a claim securing social individual s basic survival needs,wage claim has been granted specific effect in many countries,that is,the priority of claim to the ordinary,or even to security interests in the debt service.

Security interests come into the domain of eminent domain,so its litigation should not be subject to limitation.

In order to insure the process of reorganization carried out smoothly and the realization of aim of reorganization system to pursue social interests, most of reorganization legislations restrict the exertion of security interests in the process of reorganization.

A Comparative Study on the Real Rights for Security between Mainland and Taiwan;

Forestry property right is the direct-controlled and exclusive right to forest,wood and forest land,including ownership of forest,wood and forestland,and usufructuary rights and real rights for security in relation to forest,wood and forest land.

The real rights for security in narrow sense is assured by our country, including rights of mortgage, pledge and lien, which are also called typical real rights for security.

It has expanded the scope of real right for security,distinguished the creditor s rights behavior from real right changes,made new stipulations on the guarantee period of mortgage,and further strengthened the rea-right guarantee s rights.

Because priority is differ from common creditor s right,also is not the same as characteristic of typical real right for security,so we can orientate it quasi- real right for security.

Such right of priority possesses the nature of the real right for security, whose characteristics of attachment, retroactivity, subrogation and undivision become the th.