b) If none of the following applies, the porch is considered to be a useful part of the dwelling and is added while calculating useful total floor space.
3. Useful total floor space of the dwelling incorporates also the areas that are covered by in-built chimneys, wardrobes, as well as all the niches and nooks in the dwelling.
4. While specifying the total floor space of the dwelling, the following should not be taken into account:
5. Useful total floor space of rooms built by modifying the initial structure of the roof shall be calculated as follows:
6. Data concerning useful total floor space of the dwelling may be taken from the auxiliary form filled in by the lodger (user of dwelling). During the census session, the census enumerator leaves such forms in all the visited dwellings for the inhabitants to provide the census office with additional pieces of information, among others, with the calculations concerning floor space. The said form incorporates tips and hints on how to calculate the value in question. The responsibility of the census enumerator is to familiarize himself or herself with those pieces of information.
Before transferring the said data from the auxiliary form to the main one, the census enumerator shall at first visit all the habitable spaces in the dwelling and check whether or not the measurements specified in the former are acceptable and plausible. If there are certain doubts about the validity of calculations or the lodger has not filled in the auxiliary form, the census enumerator shall ask for a document containing the said information to be presented to him or her. If such documentation is available, then the enumerator shall transfer data provided therein to the main form. If there is no accessible notification justifying the provided useful floor space, the enumerator shall ask the lodger to measure the space in all the rooms. If possible, the former shall help and support the user of dwelling in the performance of the said task. Data concerning total floor space shall be provided in full square meters after proper rounding off. Decimals from 1 to 4 shall be neglected and 5 to 9 considered to be full meters. For example, for values from 45.1 m2 to 45.4 m2, the 45 m2 value shall be provided and for 45.5 m2 to 45.9 m2 46 m2.