(1)  Subject to any direction of the Court or a judge, the Principal Registrar is to invest all money in Court, other than money lodged for safe custody, in any securities specified by any law or instrument, and where none is specified, the money is to form a common fund to be invested by the Principal Registrar in –

(a) any one or more of the investments specified in section 194C(2) of the Act; or

(b) a contributory first mortgage of real estate in the State under the control of the Public Trustee or a trustee company within the meaning of the Trustee Companies Act 1953 , whether or not the moneys secured by the mortgage are provided wholly or partly by the Principal Registrar from the common fund.

(2)  The Principal Registrar is to cause to be paid into the common fund all interest earned on investments under this rule.