“Employee life insurance” is that plan of life insurance, other than salary savings life insurance or pension trust insurance and annuities, under which individual policies are issued to the employees of any employer and where such policies are issued on the lives of not less than three employees at date of issue. Premiums for such policies shall be paid by the employer or the trustee of a fund established by the employer either wholly from the employer’s funds, or funds contributed by him, or partly from such funds and partly from funds contributed by the insured employees or from funds contributed wholly by the insured employees.