Section 103. Certificates of title pursuant to patents. - Whenever public land is by the Government alienated, granted or conveyed to any person, the same shall be brought forthwith under the operation of this Decree. It shall be the duty of the official issuing the instrument of alienation, grant, patent or conveyance in behalf of the Government to cause such instrument to be filed with the Register of Deeds of the province or city where the land lies, and to be there registered like other deeds and conveyance, whereupon a certificate of title shall be entered as in other cases of registered land, and an owner's duplicate issued to the grantee. The deed, grant, patent or instrument of conveyance from the Government to the grantee shall not take effect as a conveyance or bind the land but shall operate only as a contract between the Government and the grantee and as evidence of authority to the Register of Deeds to make registration. It is the act of registration that shall be the operative act to affect and convey the land, and in all cases under this Decree, registration shall be made in the office of the Register of Deeds of the province or city where the land lies. The fees for registration shall be paid by the grantee. After due registration and issuance of the certificate of title, such land shall be deemed to be registered land to all intents and purposes under this Decree.