The association may take an asset in the mortuary fund for uncollected net premiums on policies for which the reserve has been included in the reserve valuation. No credit will be allowed for deferred premiums if a method adopted by the company or association for computing its reserve liability on outstanding policies is based on the 1956 Chamberlain Reserve Table. The State Board of Insurance will accept a reasonable estimate of the amount of this asset in lieu of an amount determined by actual computation.