The town treasurer shall keep a separate account of each such trust fund unless the same is in charge of the trustees of public funds. The income therefrom shall be subject to the order of the selectboard or board of cemetery commissioners as the case may be. Such boards shall expend such income pursuant to the conditions of the trust. When such boards neglect to expend the income pursuant to the conditions of the trust, the town may be indicted for such neglect and upon conviction be fined not more than $100.00.