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<br />report them. Aside from this, n'o federal regulation exists, <br />although many bills for this have been introduced in the U. S. <br />Congress since the 1950's. <br /> <br />State laws generally <br />operator, the person in <br />In addition, a permit is <br />seeding operation, which <br /> <br />require ticensing of the cloud seeding <br />, <br />respons~ble charge of a project. <br />I <br />usuall~ required for a given cloud <br />I <br />usuall~ lasts for a season. Two <br /> <br />major factors addressed for the 'licensing are: educational <br />qualifications and operational experience. Education is usually <br />defined in terms of a minimum nu~ber of academic credit hours <br />of college work in meteorology and/or engineering, mathematics, <br />and other physical sciences. <br /> <br />Field experience is defined in terms of a certain number <br />of years of field experience with weather modification projects. <br />Criteria that administrative agencies consider for permit <br />granting include: project personnel, seeding agents and modes, <br />equipment, target area, operational plan, emergency shutdown <br />procedures, information gatheri~g/and evaluation plan for <br />projected impact of seeding, and contract and cost information. <br />Advisory boards or committees of experts often aid in deciding <br />about a permit. <br /> <br />State reports are generally required, in addition to <br />the federal reporting mentioned a9ove. Reports require logs <br />on generator operations, type of1seeding agent, and sometimes <br />weather observations. <br /> <br />1.4 Scientific Basis for Cloud Seeding <br /> <br />Scientific weather modification grew from initial experi- <br />mentation in the late 1940's under the direction of Nobel <br /> <br />4 <br />